diff --git a/.gitignore b/.gitignore
index 088ba6b..fa083b0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,5 @@ Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk
+
+src/resources
diff --git a/Cargo.toml b/Cargo.toml
index 4b92399..66aae0a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,11 +1,14 @@
 [package]
 name = "mikaboshi"
-version = "0.1.3"
+version = "0.2.0"
 edition = "2018"
 
 [dependencies]
+# env_logger = "0.8.4"
 lazy_static = "1.4.0"
+# log = "0.4.0"
 serde = { version = "1.0.127", features = ["derive"] }
+serde_json = "1.0.75"
 sowngwala = { git = "https://github.com/minagawah/sowngwala", version = "0.4.0" }
 
 [dev-dependencies]
diff --git a/README.md b/README.md
index 6b93544..99b25c4 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,11 @@ println!("時: {} ({})", hour.alphabet(), hour.alphabet_ja());
 // 時: 癸未 (みずのと・ひつじ)
 ```
 
+## Test
+
+```
+RUST_BACKTRACE=1 cargo test -vv -- --nocapture
+```
 
 ## Dislaimer
 
diff --git a/json/ganzhi_branches.json b/json/ganzhi_branches.json
new file mode 100644
index 0000000..acb6fe3
--- /dev/null
+++ b/json/ganzhi_branches.json
@@ -0,0 +1,134 @@
+[
+  {
+    "no": 1,
+    "name": {
+      "en": "zi",
+      "ja": ["ね", "ne"],
+      "ja2": ["し", "shi"],
+      "vi": ["tí", "tí"],
+      "zh_cn": ["子", "zǐ"],
+      "zh_tw": ["子", "zǐ"]
+    }
+  },
+  {
+    "no": 2,
+    "name": {
+      "en": "chou",
+      "ja": ["うし", "ushi"],
+      "ja2": ["ちゅう", "chu"],
+      "vi": ["sửu", "sửu"],
+      "zh_cn": ["丑", "chǒu"],
+      "zh_tw": ["丑", "chǒu"]
+    }
+  },
+  {
+    "no": 3,
+    "name": {
+      "en": "",
+      "ja": ["とら", "tora"],
+      "ja2": ["いん", "in"],
+      "vi": ["dần", "dần"],
+      "zh_cn": ["寅", "yín"],
+      "zh_tw": ["寅", "yín"]
+    }
+  },
+  {
+    "no": 4,
+    "name": {
+      "en": "mao",
+      "ja": ["う", "u"],
+      "ja2": ["ぼう", "bou"],
+      "vi": ["mão", "mão"],
+      "zh_cn": ["卯", "mǎo"],
+      "zh_tw": ["卯", "mǎo"]
+    }
+  },
+  {
+    "no": 5,
+    "name": {
+      "en": "",
+      "ja": ["たつ", "tatsu"],
+      "ja2": ["しん", "shin"],
+      "vi": ["thần", "thần"],
+      "zh_cn": ["辰", "chén"],
+      "zh_tw": ["辰", "chén"]
+    }
+  },
+  {
+    "no": 6,
+    "name": {
+      "en": "si",
+      "ja": ["み", "mi"],
+      "ja2": ["し", "shi"],
+      "vi": ["tị", "tị"],
+      "zh_cn": ["巳", "sì"],
+      "zh_tw": ["巳", "sì"]
+    }
+  },
+  {
+    "no": 7,
+    "name": {
+      "en": "wu",
+      "ja": ["うま", "uma"],
+      "ja2": ["ご", "go"],
+      "vi": ["ngọ", "ngọ"],
+      "zh_cn": ["午", "wǔ"],
+      "zh_tw": ["午", "wǔ"]
+    }
+  },
+  {
+    "no": 8,
+    "name": {
+      "en": "wei",
+      "ja": ["ひつじ", "hitsuji"],
+      "ja2": ["び", "bi"],
+      "vi": ["vị", "vị"],
+      "zh_cn": ["未", "wèi"],
+      "zh_tw": ["未", "wèi"]
+    }
+  },
+  {
+    "no": 9,
+    "name": {
+      "en": "shen",
+      "ja": ["さる", "saru"],
+      "ja2": ["しん", "shin"],
+      "vi": ["thân", "thân"],
+      "zh_cn": ["申", "shēn"],
+      "zh_tw": ["申", "shēn"]
+    }
+  },
+  {
+    "no": 10,
+    "name": {
+      "en": "you",
+      "ja": ["とり", "tori"],
+      "ja2": ["ゆう", "yuu"],
+      "vi": ["dậu", "dậu"],
+      "zh_cn": ["酉", "yǒu"],
+      "zh_tw": ["酉", "yǒu"]
+    }
+  },
+  {
+    "no": 11,
+    "name": {
+      "en": "xu",
+      "ja": ["いぬ", "inu"],
+      "ja2": ["じゅつ", "jutsu"],
+      "vi": ["tuất", "tuất"],
+      "zh_cn": ["戌", "xū"],
+      "zh_tw": ["戌", "xū"]
+    }
+  },
+  {
+    "no": 12,
+    "name": {
+      "en": "hai",
+      "ja": ["い", "i"],
+      "ja2": ["がい", "gai"],
+      "vi": ["hợi", "hợi"],
+      "zh_cn": ["亥", "hài"],
+      "zh_tw": ["亥", "hài"]
+    }
+  }
+]
diff --git a/json/ganzhi_stems.json b/json/ganzhi_stems.json
new file mode 100644
index 0000000..212d54b
--- /dev/null
+++ b/json/ganzhi_stems.json
@@ -0,0 +1,112 @@
+[
+  {
+    "no": 1,
+    "name": {
+      "en": "jia",
+      "ja": ["きのえ", "kinoe"],
+      "ja2": ["コウ", "kou"],
+      "vi": ["giáp", "giap"],
+      "zh_cn": ["甲", "jiǎ"],
+      "zh_tw": ["甲", "jiǎ"]
+    }
+  },
+  {
+    "no": 2,
+    "name": {
+      "en": "yi",
+      "ja": ["きのと", "kinoto"],
+      "ja2": ["オツ", "otsu"],
+      "vi": ["ất", "ất"],
+      "zh_cn": ["乙", "yǐ"],
+      "zh_tw": ["乙", "yǐ"]
+    }
+  },
+  {
+    "no": 3,
+    "name": {
+      "en": "bing",
+      "ja": ["ひのえ", "hinoe"],
+      "ja2": ["ヘイ", "hei"],
+      "vi": ["bính", "bính"],
+      "zh_cn": ["丙", "bǐng"],
+      "zh_tw": ["丙", "bǐng"]
+    }
+  },
+  {
+    "no": 4,
+    "name": {
+      "en": "ding",
+      "ja": ["ひのと", "hinoto"],
+      "ja2": ["テイ", "tei"],
+      "vi": ["đinh", "đinh"],
+      "zh_cn": ["丁", "dīng"],
+      "zh_tw": ["丁", "dīng"]
+    }
+  },
+  {
+    "no": 5,
+    "name": {
+      "en": "wu",
+      "ja": ["つちのえ", "tsuchinoe"],
+      "ja2": ["ボ", "bo"],
+      "vi": ["mậu", "mậu"],
+      "zh_cn": ["戊", "wù"],
+      "zh_tw": ["戊", "wù"]
+    }
+  },
+  {
+    "no": 6,
+    "name": {
+      "en": "ji",
+      "ja": ["つちのと", "tsuchinoe"],
+      "ja2": ["キ", "ki"],
+      "vi": ["kỷ", "kỷ"],
+      "zh_cn": ["己", "jǐ"],
+      "zh_tw": ["己", "jǐ"]
+    }
+  },
+  {
+    "no": 7,
+    "name": {
+      "en": "geng",
+      "ja": ["かのえ", "kanoe"],
+      "ja2": ["コウ", "kou"],
+      "vi": ["canh", "canh"],
+      "zh_cn": ["庚", "gēng"],
+      "zh_tw": ["庚", "gēng"]
+    }
+  },
+  {
+    "no": 8,
+    "name": {
+      "en": "xin",
+      "ja": ["かのと", "kanoto"],
+      "ja2": ["シン", "shin"],
+      "vi": ["tân", "tân"],
+      "zh_cn": ["辛", "xīn"],
+      "zh_tw": ["辛", "xīn"]
+    }
+  },
+  {
+    "no": 9,
+    "name": {
+      "en": "ren",
+      "ja": ["みずのえ", "mizunoe"],
+      "ja2": ["ジン", "jin"],
+      "vi": ["nhâm", "nhâm"],
+      "zh_cn": ["壬", "rén"],
+      "zh_tw": ["壬", "rén"]
+    }
+  },
+  {
+    "no": 10,
+    "name": {
+      "en": "gui",
+      "ja": ["みずのと", "mizunoto"],
+      "ja2": ["キ", "ki"],
+      "vi": ["quý", "quý"],
+      "zh_cn": ["癸", "guǐ"],
+      "zh_tw": ["癸", "guǐ"]
+    }
+  }
+]
diff --git a/json/solar_terms.json b/json/solar_terms.json
new file mode 100644
index 0000000..d68eed2
--- /dev/null
+++ b/json/solar_terms.json
@@ -0,0 +1,290 @@
+[
+  {
+    "id": 1,
+    "name": {
+      "en": "lichun",
+      "ja": ["立春", "risshun"],
+      "ja2": ["りっしゅん", "risshun"],
+      "vi": ["lập xuân", "lập xuân"],
+      "zh_cn": ["立春", "lìchūn"],
+      "zh_tw": ["立春", "lìchūn"]
+    },
+    "angle": 315
+  },
+  {
+    "id": 2,
+    "name": {
+      "en": "yushui",
+      "ja": ["雨水", "usui"],
+      "ja2": ["うすい", "usui"],
+      "vi": ["vũ thủy", "vũ thủy"],
+      "zh_cn": ["雨水", "yǔshuǐ"],
+      "zh_tw": ["雨水", "yǔshuǐ"]
+    },
+    "angle": 330
+  },
+  {
+    "id": 3,
+    "name": {
+      "en": "jingzhe",
+      "ja": ["啓蟄", "keichitsu"],
+      "ja2": ["けいちつ", "keichitsu"],
+      "vi": ["kinh trập", "kinh trập"],
+      "zh_cn": ["驚蟄", "jīngzhé"],
+      "zh_tw": ["驚蟄", "jīngzhé"]
+    },
+    "angle": 345
+  },
+  {
+    "id": 4,
+    "name": {
+      "en": "chunfen",
+      "ja": ["春分", "shunbun"],
+      "ja2": ["しゅんぶん", "shunbun"],
+      "vi": ["xuân phân", "xuân phân"],
+      "zh_cn": ["春分", "chūnfēn"],
+      "zh_tw": ["春分", "chūnfēn"]
+    },
+    "angle": 0
+  },
+  {
+    "id": 5,
+    "name": {
+      "en": "qingming",
+      "ja": ["清明", "seimei"],
+      "ja2": ["せいめい", "seimei"],
+      "vi": ["thanh minh", "thanh minh"],
+      "zh_cn": ["清明", "qīngmíng"],
+      "zh_tw": ["清明", "qīngmíng"]
+    },
+    "angle": 15
+  },
+  {
+    "id": 6,
+    "name": {
+      "en": "guyu",
+      "ja": ["穀雨", "kokuu"],
+      "ja2": ["こくう", "kokuu"],
+      "vi": ["cốc vũ", "cốc vũ"],
+      "zh_cn": ["穀雨", "gǔyǔ"],
+      "zh_tw": ["穀雨", "gǔyǔ"]
+    },
+    "angle": 30
+  },
+  {
+    "id": 7,
+    "name": {
+      "en": "lixia",
+      "ja": ["立夏", "rikka"],
+      "ja2": ["りっか", "rikka"],
+      "vi": ["lập hạ", "lập hạ"],
+      "zh_cn": ["立夏", "lìxià"],
+      "zh_tw": ["立夏", "lìxià"]
+    },
+    "angle": 45
+  },
+  {
+    "id": 8,
+    "name": {
+      "en": "xiaoman",
+      "ja": ["小満", "shouman"],
+      "ja2": ["しょうまん", "shouman"],
+      "vi": ["tiểu mãn", "tiểu mãn"],
+      "zh_cn": ["小滿", "xiǎomǎn"],
+      "zh_tw": ["小滿", "xiǎomǎn"]
+    },
+    "angle": 60
+  },
+  {
+    "id": 9,
+    "name": {
+      "en": "mangzhong",
+      "ja": ["芒種", "boushu"],
+      "ja2": ["ぼうしゅ", "boushu"],
+      "vi": ["mang chủng", "mang chủng"],
+      "zh_cn": ["芒種", "mángzhòng"],
+      "zh_tw": ["芒種", "mángzhòng"]
+    },
+    "angle": 75
+  },
+  {
+    "id": 10,
+    "name": {
+      "en": "xiazhi",
+      "ja": ["夏至", "geshi"],
+      "ja2": ["げし", "geshi"],
+      "vi": ["hạ chí", "hạ chí"],
+      "zh_cn": ["夏至", "xiàzhì"],
+      "zh_tw": ["夏至", "xiàzhì"]
+    },
+    "angle": 90
+  },
+  {
+    "id": 11,
+    "name": {
+      "en": "xiaoshu",
+      "ja": ["小暑", "shousho"],
+      "ja2": ["しょうしょ", "shousho"],
+      "vi": ["tiểu thử", "tiểu thử"],
+      "zh_cn": ["小暑", "xiǎoshǔ"],
+      "zh_tw": ["小暑", "xiǎoshǔ"]
+    },
+    "angle": 105
+  },
+  {
+    "id": 12,
+    "name": {
+      "en": "dashu",
+      "ja": ["大暑", "taisho"],
+      "ja2": ["たいしょ", "taisho"],
+      "vi": ["đại thử", "đại thử"],
+      "zh_cn": ["大暑", "dàshǔ"],
+      "zh_tw": ["大暑", "dàshǔ"]
+    },
+    "angle": 120
+  },
+  {
+    "id": 13,
+    "name": {
+      "en": "liqiu",
+      "ja": ["立秋", "risshuu"],
+      "ja2": ["りっしゅう", "risshuu"],
+      "vi": ["lập thu", "lập thu"],
+      "zh_cn": ["立秋", "lìqiū"],
+      "zh_tw": ["立秋", "lìqiū"]
+    },
+    "angle": 135
+  },
+  {
+    "id": 14,
+    "name": {
+      "en": "chushu",
+      "ja": ["処暑", "shosho"],
+      "ja2": ["しょしょ", "shosho"],
+      "vi": ["xử thử", "xử thử"],
+      "zh_cn": ["處暑", "chǔshǔ"],
+      "zh_tw": ["處暑", "chǔshǔ"]
+    },
+    "angle": 150
+  },
+  {
+    "id": 15,
+    "name": {
+      "en": "bailu",
+      "ja": ["白露", "hakuro"],
+      "ja2": ["はくろ", "hakuro"],
+      "vi": ["bạch lộ", "bạch lộ"],
+      "zh_cn": ["白露", "báilù"],
+      "zh_tw": ["白露", "báilù"]
+    },
+    "angle": 165
+  },
+  {
+    "id": 16,
+    "name": {
+      "en": "qiufen",
+      "ja": ["秋分", "shubun"],
+      "ja2": ["しゅうぶん", "shubun"],
+      "vi": ["thu phân", "thu phân"],
+      "zh_cn": ["秋分", "qiūfēn"],
+      "zh_tw": ["秋分", "qiūfēn"]
+    },
+    "angle": 180
+  },
+  {
+    "id": 17,
+    "name": {
+      "en": "hanlu",
+      "ja": ["寒露", "kanro"],
+      "ja2": ["かんろ", "kanro"],
+      "vi": ["hàn lộ", "hàn lộ"],
+      "zh_cn": ["寒露", "hánlù"],
+      "zh_tw": ["寒露", "hánlù"]
+    },
+    "angle": 195
+  },
+  {
+    "id": 18,
+    "name": {
+      "en": "shuanjiang",
+      "ja": ["霜降", "soukou"],
+      "ja2": ["そうこう", "soukou"],
+      "vi": ["sương giáng", "sương giáng"],
+      "zh_cn": ["霜降", "shuāngjiàng"],
+      "zh_tw": ["", ""]
+    },
+    "angle": 210
+  },
+  {
+    "id": 19,
+    "name": {
+      "en": "lidong",
+      "ja": ["立冬", "rittou"],
+      "ja2": ["りっとう", "rittou"],
+      "vi": ["lập đông", "lập đông"],
+      "zh_cn": ["立冬", "lìdōng"],
+      "zh_tw": ["立冬", "lìdōng"]
+    },
+    "angle": 225
+  },
+  {
+    "id": 20,
+    "name": {
+      "en": "xiaoxue",
+      "ja": ["小雪", "shousetsu"],
+      "ja2": ["しょうせつ", "shousetsu"],
+      "vi": ["tiểu tuyết", "tiểu tuyết"],
+      "zh_cn": ["小雪", "xiǎoxuě"],
+      "zh_tw": ["小雪", "xiǎoxuě"]
+    },
+    "angle": 240
+  },
+  {
+    "id": 21,
+    "name": {
+      "en": "daxue",
+      "ja": ["大雪", "taisetsu"],
+      "ja2": ["たいせつ", "taisetsu"],
+      "vi": ["đại tuyết", "đại tuyết"],
+      "zh_cn": ["大雪", "dàxuě"],
+      "zh_tw": ["大雪", "dàxuě"]
+    },
+    "angle": 255
+  },
+  {
+    "id": 22,
+    "name": {
+      "en": "dongzhi",
+      "ja": ["冬至", "touji"],
+      "ja2": ["とうじ", "touji"],
+      "vi": ["Đông chí", "Đông chí"],
+      "zh_cn": ["冬至", "dōngzhì"],
+      "zh_tw": ["冬至", "dōngzhì"]
+    },
+    "angle": 270
+  },
+  {
+    "id": 23,
+    "name": {
+      "en": "xiaohan",
+      "ja": ["小寒", "shoukan"],
+      "ja2": ["しょうかん", "shoukan"],
+      "vi": ["tiểu hàn", "tiểu hàn"],
+      "zh_cn": ["小寒", "xiǎohán"],
+      "zh_tw": ["小寒", "xiǎohán"]
+    },
+    "angle": 285
+  },
+  {
+    "id": 24,
+    "name": {
+      "en": "dahan",
+      "ja": ["大寒", "daikan"],
+      "ja2": ["だいかん", "daikan"],
+      "vi": ["Đại hàn", "Đại hàn"],
+      "zh_cn": ["大寒", "dàhán"],
+      "zh_tw": ["大寒", "dàhán"]
+    },
+    "angle": 300
+  }
+]
diff --git a/src/constants.rs b/src/constants.rs
index 7308838..6243b9b 100644
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,322 +1,61 @@
-use crate::language::{ Language, LanguageDetails };
-use crate::ganzhi::{ Stem, Branch };
+use serde::{Deserialize, Serialize};
+
+use crate::ganzhi::{Branch, Stem};
+use crate::language::{Language, LanguageDetails};
 use crate::solar_terms::SolarTerm;
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct LanguageData {
+    pub en: String,
+    pub ja: Vec<String>,
+    pub ja2: Vec<String>,
+    pub vi: Vec<String>,
+    pub zh_cn: Vec<String>,
+    pub zh_tw: Vec<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SolarTermData {
+    pub id: u8,
+    pub name: LanguageData,
+    pub angle: u16,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct StemData {
+    pub no: u8,
+    pub name: LanguageData,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BranchData {
+    pub no: u8,
+    pub name: LanguageData,
+}
+
 lazy_static! {
-    pub static ref SOLAR_TERMS: Vec<SolarTerm> = vec![
-        // 立春 (lichun)
-        SolarTerm {
-            id: 1,
-            name: Language {
-                en: "lichun".into(),
-                ja: LanguageDetails::new("立春", "risshun"),
-                ja2: LanguageDetails::new("りっしゅん", "risshun"),
-                vi: LanguageDetails::new("lập xuân", "lập xuân"),
-                zh_cn: LanguageDetails::new("立春", "lìchūn"),
-                zh_tw: LanguageDetails::new("立春", "lìchūn"),
-            },
-            angle: 315,
-        },
-        // 雨水 (yushui)
-        SolarTerm {
-            id: 2,
-            name: Language {
-                en: "yushui".into(),
-                ja: LanguageDetails::new("雨水", "usui"),
-                ja2: LanguageDetails::new("うすい", "usui"),
-                vi: LanguageDetails::new("vũ thủy", "vũ thủy"),
-                zh_cn: LanguageDetails::new("雨水", "yǔshuǐ"),
-                zh_tw: LanguageDetails::new("雨水", "yǔshuǐ"),
-            },
-            angle: 330,
-        },
-        // 驚蟄 (啓蟄) (jingzhe)
-        SolarTerm {
-            id: 3,
-            name: Language {
-                en: "jingzhe".into(),
-                ja: LanguageDetails::new("啓蟄", "keichitsu"),
-                ja2: LanguageDetails::new("けいちつ", "keichitsu"),
-                vi: LanguageDetails::new("kinh trập", "kinh trập"),
-                zh_cn: LanguageDetails::new("驚蟄", "jīngzhé"),
-                zh_tw: LanguageDetails::new("驚蟄", "jīngzhé"),
-            },
-            angle: 345,
-        },
-        // 春分 (chunfen)
-        SolarTerm {
-            id: 4,
-            name: Language {
-                en: "chunfen".into(),
-                ja: LanguageDetails::new("春分", "shunbun"),
-                ja2: LanguageDetails::new("しゅんぶん", "shunbun"),
-                vi: LanguageDetails::new("xuân phân", "xuân phân"),
-                zh_cn: LanguageDetails::new("春分", "chūnfēn"),
-                zh_tw: LanguageDetails::new("春分", "chūnfēn"),
-            },
-            angle: 0,
-        },
-        // 清明 (qingming)
-        SolarTerm {
-            id: 5,
-            name: Language {
-                en: "qingming".into(),
-                ja: LanguageDetails::new("清明", "seimei"),
-                ja2: LanguageDetails::new("せいめい", "seimei"),
-                vi: LanguageDetails::new("thanh minh", "thanh minh"),
-                zh_cn: LanguageDetails::new("清明", "qīngmíng"),
-                zh_tw: LanguageDetails::new("清明", "qīngmíng"),
-            },
-            angle: 15,
-        },
-        // 穀雨 (guyu)
-        SolarTerm {
-            id: 6,
-            name: Language {
-                en: "guyu".into(),
-                ja: LanguageDetails::new("穀雨", "kokuu"),
-                ja2: LanguageDetails::new("こくう", "kokuu"),
-                vi: LanguageDetails::new("cốc vũ", "cốc vũ"),
-                zh_cn: LanguageDetails::new("穀雨", "gǔyǔ"),
-                zh_tw: LanguageDetails::new("穀雨", "gǔyǔ"),
-            },
-            angle: 30,
-        },
-        // 立夏 (lixia)
-        SolarTerm {
-            id: 7,
-            name: Language {
-                en: "lixia".into(),
-                ja: LanguageDetails::new("立夏", "rikka"),
-                ja2: LanguageDetails::new("りっか", "rikka"),
-                vi: LanguageDetails::new("lập hạ", "lập hạ"),
-                zh_cn: LanguageDetails::new("立夏", "lìxià"),
-                zh_tw: LanguageDetails::new("立夏", "lìxià"),
-            },
-            angle: 45,
-        },
-        // 小滿 (xiaoman)
-        SolarTerm {
-            id: 8,
-            name: Language {
-                en: "xiaoman".into(),
-                ja: LanguageDetails::new("小満", "shouman"),
-                ja2: LanguageDetails::new("しょうまん", "shouman"),
-                vi: LanguageDetails::new("tiểu mãn", "tiểu mãn"),
-                zh_cn: LanguageDetails::new("小滿", "xiǎomǎn"),
-                zh_tw: LanguageDetails::new("小滿", "xiǎomǎn"),
-            },
-            angle: 60,
-        },
-        // 芒種 (mangzhong)
-        SolarTerm {
-            id: 9,
-            name: Language {
-                en: "mangzhong".into(),
-                ja: LanguageDetails::new("芒種", "boushu"),
-                ja2: LanguageDetails::new("ぼうしゅ", "boushu"),
-                vi: LanguageDetails::new("mang chủng", "mang chủng"),
-                zh_cn: LanguageDetails::new("芒種", "mángzhòng"),
-                zh_tw: LanguageDetails::new("芒種", "mángzhòng"),
-            },
-            angle: 75,
-        },
-        // 夏至 (xiazhi)
-        SolarTerm {
-            id: 10,
-            name: Language {
-                en: "xiazhi".into(),
-                ja: LanguageDetails::new("夏至", "geshi"),
-                ja2: LanguageDetails::new("げし", "geshi"),
-                vi: LanguageDetails::new("hạ chí", "hạ chí"),
-                zh_cn: LanguageDetails::new("夏至", "xiàzhì"),
-                zh_tw: LanguageDetails::new("夏至", "xiàzhì"),
-            },
-            angle: 90,
-        },
-        // 小暑 (xiaoshu)
-        SolarTerm {
-            id: 11,
-            name: Language {
-                en: "xiaoshu".into(),
-                ja: LanguageDetails::new("小暑", "shousho"),
-                ja2: LanguageDetails::new("しょうしょ", "shousho"),
-                vi: LanguageDetails::new("tiểu thử", "tiểu thử"),
-                zh_cn: LanguageDetails::new("小暑", "xiǎoshǔ"),
-                zh_tw: LanguageDetails::new("小暑", "xiǎoshǔ"),
-            },
-            angle: 105,
-        },
-        // 大暑 (dashu)
-        SolarTerm {
-            id: 12,
-            name: Language {
-                en: "dashu".into(),
-                ja: LanguageDetails::new("大暑", "taisho"),
-                ja2: LanguageDetails::new("たいしょ", "taisho"),
-                vi: LanguageDetails::new("đại thử", "đại thử"),
-                zh_cn: LanguageDetails::new("大暑", "dàshǔ"),
-                zh_tw: LanguageDetails::new("大暑", "dàshǔ"),
-            },
-            angle: 120,
-        },
-        // 立秋 (liqiu)
-        SolarTerm {
-            id: 13,
-            name: Language {
-                en: "liqiu".into(),
-                ja: LanguageDetails::new("立秋", "risshuu"),
-                ja2: LanguageDetails::new("りっしゅう", "risshuu"),
-                vi: LanguageDetails::new("lập thu", "lập thu"),
-                zh_cn: LanguageDetails::new("立秋", "lìqiū"),
-                zh_tw: LanguageDetails::new("立秋", "lìqiū"),
-            },
-            angle: 135,
-        },
-        // 處暑 (chushu)
-        SolarTerm {
-            id: 14,
-            name: Language {
-                en: "chushu".into(),
-                ja: LanguageDetails::new("処暑", "shosho"),
-                ja2: LanguageDetails::new("しょしょ", "shosho"),
-                vi: LanguageDetails::new("xử thử", "xử thử"),
-                zh_cn: LanguageDetails::new("處暑", "chǔshǔ"),
-                zh_tw: LanguageDetails::new("處暑", "chǔshǔ"),
-            },
-            angle: 150,
-        },
-        // 白露 (bailu)
-        SolarTerm {
-            id: 15,
-            name: Language {
-                en: "bailu".into(),
-                ja: LanguageDetails::new("白露", "hakuro"),
-                ja2: LanguageDetails::new("はくろ", "hakuro"),
-                vi: LanguageDetails::new("bạch lộ", "bạch lộ"),
-                zh_cn: LanguageDetails::new("白露", "báilù"),
-                zh_tw: LanguageDetails::new("白露", "báilù"),
-            },
-            angle: 165,
-        },
-        // 秋分 (qiufen)
-        SolarTerm {
-            id: 16,
-            name: Language {
-                en: "qiufen".into(),
-                ja: LanguageDetails::new("秋分", "shubun"),
-                ja2: LanguageDetails::new("しゅうぶん", "shubun"),
-                vi: LanguageDetails::new("thu phân", "thu phân"),
-                zh_cn: LanguageDetails::new("秋分", "qiūfēn"),
-                zh_tw: LanguageDetails::new("秋分", "qiūfēn"),
-            },
-            angle: 180,
-        },
-        // 寒露 (hanlu)
-        SolarTerm {
-            id: 17,
-            name: Language {
-                en: "hanlu".into(),
-                ja: LanguageDetails::new("寒露", "kanro"),
-                ja2: LanguageDetails::new("かんろ", "kanro"),
-                vi: LanguageDetails::new("hàn lộ", "hàn lộ"),
-                zh_cn: LanguageDetails::new("寒露", "hánlù"),
-                zh_tw: LanguageDetails::new("寒露", "hánlù"),
-            },
-            angle: 195,
-        },
-        // 霜降 (shuangjiang)
-        SolarTerm {
-            id: 18,
-            name: Language {
-                en: "shuanjiang".into(),
-                ja: LanguageDetails::new("霜降", "soukou"),
-                ja2: LanguageDetails::new("そうこう", "soukou"),
-                vi: LanguageDetails::new("sương giáng", "sương giáng"),
-                zh_cn: LanguageDetails::new("霜降", "shuāngjiàng"),
-                zh_tw: LanguageDetails::new("", ""),
-            },
-            angle: 210,
-        },
-        // 立冬 (lidong)
-        SolarTerm {
-            id: 19,
-            name: Language {
-                en: "lidong".into(),
-                ja: LanguageDetails::new("立冬", "rittou"),
-                ja2: LanguageDetails::new("りっとう", "rittou"),
-                vi: LanguageDetails::new("lập đông", "lập đông"),
-                zh_cn: LanguageDetails::new("立冬", "lìdōng"),
-                zh_tw: LanguageDetails::new("立冬", "lìdōng"),
-            },
-            angle: 225,
-        },
-        // 小雪 (xiaoxue)
-        SolarTerm {
-            id: 20,
-            name: Language {
-                en: "xiaoxue".into(),
-                ja: LanguageDetails::new("小雪", "shousetsu"),
-                ja2: LanguageDetails::new("しょうせつ", "shousetsu"),
-                vi: LanguageDetails::new("tiểu tuyết", "tiểu tuyết"),
-                zh_cn: LanguageDetails::new("小雪", "xiǎoxuě"),
-                zh_tw: LanguageDetails::new("小雪", "xiǎoxuě"),
-            },
-            angle: 240,
-        },
-        // 大雪 (daxue)
-        SolarTerm {
-            id: 21,
-            name: Language {
-                en: "daxue".into(),
-                ja: LanguageDetails::new("大雪", "taisetsu"),
-                ja2: LanguageDetails::new("たいせつ", "taisetsu"),
-                vi: LanguageDetails::new("đại tuyết", "đại tuyết"),
-                zh_cn: LanguageDetails::new("大雪", "dàxuě"),
-                zh_tw: LanguageDetails::new("大雪", "dàxuě"),
-            },
-            angle: 255,
-        },
-        // 冬至 (dongzhi)
-        SolarTerm {
-            id: 22,
-            name: Language {
-                en: "dongzhi".into(),
-                ja: LanguageDetails::new("冬至", "touji"),
-                ja2: LanguageDetails::new("とうじ", "touji"),
-                vi: LanguageDetails::new("Đông chí", "Đông chí"),
-                zh_cn: LanguageDetails::new("冬至", "dōngzhì"),
-                zh_tw: LanguageDetails::new("冬至", "dōngzhì"),
-            },
-            angle: 270,
-        },
-        // 小寒 (xiaohan)
-        SolarTerm {
-            id: 23,
-            name: Language {
-                en: "xiaohan".into(),
-                ja: LanguageDetails::new("小寒", "shoukan"),
-                ja2: LanguageDetails::new("しょうかん", "shoukan"),
-                vi: LanguageDetails::new("tiểu hàn", "tiểu hàn"),
-                zh_cn: LanguageDetails::new("小寒", "xiǎohán"),
-                zh_tw: LanguageDetails::new("小寒", "xiǎohán"),
-            },
-            angle: 285,
-        },
-        // 大寒 (dahan)
-        SolarTerm {
-            id: 24,
-            name: Language {
-                en: "dahan".into(),
-                ja: LanguageDetails::new("大寒", "daikan"),
-                ja2: LanguageDetails::new("だいかん", "daikan"),
-                vi: LanguageDetails::new("Đại hàn", "Đại hàn"),
-                zh_cn: LanguageDetails::new("大寒", "dàhán"),
-                zh_tw: LanguageDetails::new("大寒", "dàhán"),
-            },
-            angle: 300,
-        },
-    ];
+    pub static ref SOLAR_TERMS: Vec<SolarTerm> = {
+        let json = &include_str!("../json/solar_terms.json");
+        let data: Vec<SolarTermData> = match serde_json::from_str(json) {
+            Ok(json) => json,
+            Err(err) => panic!("Error: {}", err),
+        };
+        data.iter().map(|item| {
+            let item = item.clone();
+            SolarTerm {
+                id: item.id,
+                name: Language {
+                    en: item.name.en,
+                    ja: LanguageDetails::new(&item.name.ja[0], &item.name.ja[1]),
+                    ja2: LanguageDetails::new(&item.name.ja2[0], &item.name.ja2[1]),
+                    vi: LanguageDetails::new(&item.name.vi[0], &item.name.vi[1]),
+                    zh_cn: LanguageDetails::new(&item.name.zh_cn[0], &item.name.zh_cn[1]),
+                    zh_tw: LanguageDetails::new(&item.name.zh_tw[0], &item.name.zh_tw[1]),
+                },
+                angle: item.angle,
+            }
+        }).collect()
+    };
 
     // Combination of Stems (10) and Branches (12) which makes 60 patterns.
     pub static ref GANZHI_SEXAGESIMAL: Vec<(usize, usize)> = {
@@ -329,275 +68,50 @@ lazy_static! {
         v
     };
 
-    pub static ref STEMS: Vec<Stem> = vec![
-        // 甲 (jia)
-        Stem {
-            no: 1,
-            name: Language {
-                en: "jia".into(),
-                ja: LanguageDetails::new("きのえ", "kinoe"),
-                ja2: LanguageDetails::new("コウ", "kou"),
-                vi: LanguageDetails::new("giáp", "giap"),
-                zh_cn: LanguageDetails::new("甲", "jiǎ"),
-                zh_tw: LanguageDetails::new("甲", "jiǎ"),
-            },
-        },
-        // 乙 (yi)
-        Stem {
-            no: 2,
-            name: Language {
-                en: "yi".into(),
-                ja: LanguageDetails::new("きのと", "kinoto"),
-                ja2: LanguageDetails::new("オツ", "otsu"),
-                vi: LanguageDetails::new("ất", "ất"),
-                zh_cn: LanguageDetails::new("乙", "yǐ"),
-                zh_tw: LanguageDetails::new("乙", "yǐ"),
-            },
-        },
-        // 丙 (bing)
-        Stem {
-            no: 3,
-            name: Language {
-                en: "bing".into(),
-                ja: LanguageDetails::new("ひのえ", "hinoe"),
-                ja2: LanguageDetails::new("ヘイ", "hei"),
-                vi: LanguageDetails::new("bính", "bính"),
-                zh_cn: LanguageDetails::new("丙", "bǐng"),
-                zh_tw: LanguageDetails::new("丙", "bǐng"),
-            },
-        },
-        // 丁 (ding)
-        Stem {
-            no: 4,
-            name: Language {
-                en: "ding".into(),
-                ja: LanguageDetails::new("ひのと", "hinoto"),
-                ja2: LanguageDetails::new("テイ", "tei"),
-                vi: LanguageDetails::new("đinh", "đinh"),
-                zh_cn: LanguageDetails::new("丁", "dīng"),
-                zh_tw: LanguageDetails::new("丁", "dīng"),
-            },
-        },
-        // 戊 (wu)
-        Stem {
-            no: 5,
-            name: Language {
-                en: "wu".into(),
-                ja: LanguageDetails::new("つちのえ", "tsuchinoe"),
-                ja2: LanguageDetails::new("ボ", "bo"),
-                vi: LanguageDetails::new("mậu", "mậu"),
-                zh_cn: LanguageDetails::new("戊", "wù"),
-                zh_tw: LanguageDetails::new("戊", "wù"),
-            },
-        },
-        // 己 (ji)
-        Stem {
-            no: 6,
-            name: Language {
-                en: "ji".into(),
-                ja: LanguageDetails::new("つちのと", "tsuchinoe"),
-                ja2: LanguageDetails::new("キ", "ki"),
-                vi: LanguageDetails::new("kỷ", "kỷ"),
-                zh_cn: LanguageDetails::new("己", "jǐ"),
-                zh_tw: LanguageDetails::new("己", "jǐ"),
-            },
-        },
-        // 庚 (geng)
-        Stem {
-            no: 7,
-            name: Language {
-                en: "geng".into(),
-                ja: LanguageDetails::new("かのえ", "kanoe"),
-                ja2: LanguageDetails::new("コウ", "kou"),
-                vi: LanguageDetails::new("canh", "canh"),
-                zh_cn: LanguageDetails::new("庚", "gēng"),
-                zh_tw: LanguageDetails::new("庚", "gēng"),
-            },
-        },
-        // 辛 (xin)
-        Stem {
-            no: 8,
-            name: Language {
-                en: "xin".into(),
-                ja: LanguageDetails::new("かのと", "kanoto"),
-                ja2: LanguageDetails::new("シン", "shin"),
-                vi: LanguageDetails::new("tân", "tân"),
-                zh_cn: LanguageDetails::new("辛", "xīn"),
-                zh_tw: LanguageDetails::new("辛", "xīn"),
-            },
-        },
-        // 壬 (ren)
-        Stem {
-            no: 9,
-            name: Language {
-                en: "ren".into(),
-                ja: LanguageDetails::new("みずのえ", "mizunoe"),
-                ja2: LanguageDetails::new("ジン", "jin"),
-                vi: LanguageDetails::new("nhâm", "nhâm"),
-                zh_cn: LanguageDetails::new("壬", "rén"),
-                zh_tw: LanguageDetails::new("壬", "rén"),
-            },
-        },
-        // 癸 (gui)
-        Stem {
-            no: 10,
-            name: Language {
-                en: "gui".into(),
-                ja: LanguageDetails::new("みずのと", "mizunoto"),
-                ja2: LanguageDetails::new("キ", "ki"),
-                vi: LanguageDetails::new("quý", "quý"),
-                zh_cn: LanguageDetails::new("癸", "guǐ"),
-                zh_tw: LanguageDetails::new("癸", "guǐ"),
-            },
-        },
-    ];
+    pub static ref STEMS: Vec<Stem> = {
+        let json = &include_str!("../json/ganzhi_stems.json");
+        let data: Vec<StemData> = match serde_json::from_str(json) {
+            Ok(json) => json,
+            Err(err) => panic!("Error: {}", err),
+        };
+        data.iter().map(|item| {
+            let item = item.clone();
+            Stem {
+                no: item.no,
+                name: Language {
+                    en: item.name.en,
+                    ja: LanguageDetails::new(&item.name.ja[0], &item.name.ja[1]),
+                    ja2: LanguageDetails::new(&item.name.ja2[0], &item.name.ja2[1]),
+                    vi: LanguageDetails::new(&item.name.vi[0], &item.name.vi[1]),
+                    zh_cn: LanguageDetails::new(&item.name.zh_cn[0], &item.name.zh_cn[1]),
+                    zh_tw: LanguageDetails::new(&item.name.zh_tw[0], &item.name.zh_tw[1]),
+                },
+            }
+        }).collect()
+    };
 
-    pub static ref BRANCHES: Vec<Branch> = vec![
-        // 子 (zi)
-        Branch {
-            no: 1,
-            name: Language {
-                en: "zi".into(),
-                ja: LanguageDetails::new("ね", "ne"),
-                ja2: LanguageDetails::new("し", "shi"),
-                vi: LanguageDetails::new("tí", "tí"),
-                zh_cn: LanguageDetails::new("子", "zǐ"),
-                zh_tw: LanguageDetails::new("子", "zǐ"),
-            },
-        },
-        // 丑 (chou)
-        Branch {
-            no: 2,
-            name: Language {
-                en: "chou".into(),
-                ja: LanguageDetails::new("うし", "ushi"),
-                ja2: LanguageDetails::new("ちゅう", "chu"),
-                vi: LanguageDetails::new("sửu", "sửu"),
-                zh_cn: LanguageDetails::new("丑", "chǒu"),
-                zh_tw: LanguageDetails::new("丑", "chǒu"),
-            },
-        },
-        // 寅 (yin)
-        Branch {
-            no: 3,
-            name: Language {
-                en: "".into(),
-                ja: LanguageDetails::new("とら", "tora"),
-                ja2: LanguageDetails::new("いん", "in"),
-                vi: LanguageDetails::new("dần", "dần"),
-                zh_cn: LanguageDetails::new("寅", "yín"),
-                zh_tw: LanguageDetails::new("寅", "yín"),
-            },
-        },
-        // 卯 (mao)
-        Branch {
-            no: 4,
-            name: Language {
-                en: "mao".into(),
-                ja: LanguageDetails::new("う", "u"),
-                ja2: LanguageDetails::new("ぼう", "bou"),
-                vi: LanguageDetails::new("mão", "mão"),
-                zh_cn: LanguageDetails::new("卯", "mǎo"),
-                zh_tw: LanguageDetails::new("卯", "mǎo"),
-            },
-        },
-        // 辰 (chen)
-        Branch {
-            no: 5,
-            name: Language {
-                en: "".into(),
-                ja: LanguageDetails::new("たつ", "tatsu"),
-                ja2: LanguageDetails::new("しん", "shin"),
-                vi: LanguageDetails::new("thần", "thần"),
-                zh_cn: LanguageDetails::new("辰", "chén"),
-                zh_tw: LanguageDetails::new("辰", "chén"),
-            },
-        },
-        // 巳 (si)
-        Branch {
-            no: 6,
-            name: Language {
-                en: "si".into(),
-                ja: LanguageDetails::new("み", "mi"),
-                ja2: LanguageDetails::new("し", "shi"),
-                vi: LanguageDetails::new("tị", "tị"),
-                zh_cn: LanguageDetails::new("巳", "sì"),
-                zh_tw: LanguageDetails::new("巳", "sì"),
-            },
-        },
-        // 午 (wu)
-        Branch {
-            no: 7,
-            name: Language {
-                en: "wu".into(),
-                ja: LanguageDetails::new("うま", "uma"),
-                ja2: LanguageDetails::new("ご", "go"),
-                vi: LanguageDetails::new("ngọ", "ngọ"),
-                zh_cn: LanguageDetails::new("午", "wǔ"),
-                zh_tw: LanguageDetails::new("午", "wǔ"),
-            },
-        },
-        // 未 (wei)
-        Branch {
-            no: 8,
-            name: Language {
-                en: "wei".into(),
-                ja: LanguageDetails::new("ひつじ", "hitsuji"),
-                ja2: LanguageDetails::new("び", "bi"),
-                vi: LanguageDetails::new("vị", "vị"),
-                zh_cn: LanguageDetails::new("未", "wèi"),
-                zh_tw: LanguageDetails::new("未", "wèi"),
-            },
-        },
-        // 申 (shen)
-        Branch {
-            no: 9,
-            name: Language {
-                en: "shen".into(),
-                ja: LanguageDetails::new("さる", "saru"),
-                ja2: LanguageDetails::new("しん", "shin"),
-                vi: LanguageDetails::new("thân", "thân"),
-                zh_cn: LanguageDetails::new("申", "shēn"),
-                zh_tw: LanguageDetails::new("申", "shēn"),
-            },
-        },
-        // 酉 (you)
-        Branch {
-            no: 10,
-            name: Language {
-                en: "you".into(),
-                ja: LanguageDetails::new("とり", "tori"),
-                ja2: LanguageDetails::new("ゆう", "yuu"),
-                vi: LanguageDetails::new("dậu", "dậu"),
-                zh_cn: LanguageDetails::new("酉", "yǒu"),
-                zh_tw: LanguageDetails::new("酉", "yǒu"),
-            },
-        },
-        // 戌 (xu)
-        Branch {
-            no: 11,
-            name: Language {
-                en: "xu".into(),
-                ja: LanguageDetails::new("いぬ", "inu"),
-                ja2: LanguageDetails::new("じゅつ", "jutsu"),
-                vi: LanguageDetails::new("tuất", "tuất"),
-                zh_cn: LanguageDetails::new("戌", "xū"),
-                zh_tw: LanguageDetails::new("戌", "xū"),
-            },
-        },
-        // 亥 (hai)
-        Branch {
-            no: 12,
-            name: Language {
-                en: "hai".into(),
-                ja: LanguageDetails::new("い", "i"),
-                ja2: LanguageDetails::new("がい", "gai"),
-                vi: LanguageDetails::new("hợi", "hợi"),
-                zh_cn: LanguageDetails::new("亥", "hài"),
-                zh_tw: LanguageDetails::new("亥", "hài"),
-            },
-        },
-    ];
+    pub static ref BRANCHES: Vec<Branch> = {
+        let json = &include_str!("../json/ganzhi_branches.json");
+        let data: Vec<BranchData> = match serde_json::from_str(json) {
+            Ok(json) => json,
+            Err(err) => panic!("Error: {}", err),
+        };
+
+        data.iter().map(|item| {
+            let item = item.clone();
+            Branch {
+                no: item.no,
+                name: Language {
+                    en: item.name.en,
+                    ja: LanguageDetails::new(&item.name.ja[0], &item.name.ja[1]),
+                    ja2: LanguageDetails::new(&item.name.ja2[0], &item.name.ja2[1]),
+                    vi: LanguageDetails::new(&item.name.vi[0], &item.name.vi[1]),
+                    zh_cn: LanguageDetails::new(&item.name.zh_cn[0], &item.name.zh_cn[1]),
+                    zh_tw: LanguageDetails::new(&item.name.zh_tw[0], &item.name.zh_tw[1]),
+                },
+            }
+        }).collect()
+    };
 
     /// This is a table used when finding Hour Stem.
     /// Columns represents Day Stem groups, and there are 5 groups.
diff --git a/src/ganzhi.rs b/src/ganzhi.rs
index ec5b0f5..bdf766b 100644
--- a/src/ganzhi.rs
+++ b/src/ganzhi.rs
@@ -1,23 +1,13 @@
 #[cfg(test)]
 use sowngwala::time::Month;
 
-use serde::{ Deserialize, Serialize };
+use serde::{Deserialize, Serialize};
 use sowngwala::time::{
-    Date,
-    Time,
-    DateTime,
-    julian_day,
-    julian_day_from_ut,
-    modified_julian_day_from_ut,
+    julian_day, julian_day_from_ut, modified_julian_day_from_ut, Date, DateTime, Time,
 };
 
-use crate::constants::{
-    HOUR_STEM_TABLE,
-    GANZHI_SEXAGESIMAL,
-    STEMS,
-    BRANCHES,
-};
-use crate::language::{ Language, LanguageTrait };
+use crate::constants::{BRANCHES, GANZHI_SEXAGESIMAL, HOUR_STEM_TABLE, STEMS};
+use crate::language::{Language, LanguageTrait};
 use crate::solar_terms::get_lichun;
 use crate::time::ut_from_local;
 use crate::utils::longitude_of_the_sun_from_date;
@@ -64,41 +54,24 @@ impl GanZhi<'_> {
     /// Concatenate Stem & Branch (for Chinese characters)
     #[allow(dead_code)]
     fn alphabet(&self) -> String {
-        format!(
-            "{}{}",
-            self.stem.alphabet(),
-            self.branch.alphabet()
-        )
+        format!("{}{}", self.stem.alphabet(), self.branch.alphabet())
     }
 
     /// Concatenate Stem & Branch (for Chinese phonetics)
     #[allow(dead_code)]
     fn phonetic(&self) -> String {
-        format!(
-            "{} {}",
-            self.stem.phonetic(),
-            self.branch.phonetic()
-        )
+        format!("{} {}", self.stem.phonetic(), self.branch.phonetic())
     }
 
     /// Concatenate Stem & Branch (for Japanese characters)
     #[allow(dead_code)]
     fn alphabet_ja(&self) -> String {
-        format!(
-            "{}・{}",
-            self.stem.alphabet_ja(),
-            self.branch.alphabet_ja()
-        )
+        format!("{}・{}", self.stem.alphabet_ja(), self.branch.alphabet_ja())
     }
 }
 
 impl<'a> Bazi<'a> {
-    fn new(
-        year: GanZhi<'a>,
-        month: GanZhi<'a>,
-        day: GanZhi<'a>,
-        hour: GanZhi<'a>
-    ) -> Self {
+    fn new(year: GanZhi<'a>, month: GanZhi<'a>, day: GanZhi<'a>, hour: GanZhi<'a>) -> Self {
         Bazi {
             year,
             month,
@@ -224,7 +197,7 @@ fn _month_ganzhi(ut: Box<DateTime>, year_stem_no: u8) -> GanZhi<'static> {
 fn _day_ganzhi(ut: Box<DateTime>) -> GanZhi<'static> {
     let mjd: f64 = modified_julian_day_from_ut(&*ut);
     let index = ((mjd - 10.0) % 60.0).floor() as usize;
-    
+
     let (stem_id, branch_id) = GANZHI_SEXAGESIMAL[index];
 
     GanZhi {
diff --git a/src/language.rs b/src/language.rs
index 0e5e025..85c5983 100644
--- a/src/language.rs
+++ b/src/language.rs
@@ -1,4 +1,4 @@
-use serde::{ Deserialize, Serialize };
+use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct LanguageDetails {
diff --git a/src/solar_terms.rs b/src/solar_terms.rs
index 4a47a0a..f4c555d 100644
--- a/src/solar_terms.rs
+++ b/src/solar_terms.rs
@@ -1,6 +1,6 @@
-use sowngwala::time::{ Month, Date, add_date };
+use sowngwala::time::{add_date, Date, Month};
 
-use crate::language::{ Language, LanguageTrait };
+use crate::language::{Language, LanguageTrait};
 use crate::utils::longitude_of_the_sun_from_date;
 
 #[derive(Debug)]
@@ -48,7 +48,11 @@ pub fn get_last_term(date: &Date) -> (f64, Date) {
 /// * `date` - &Date
 #[allow(clippy::many_single_char_names)]
 pub fn get_lichun(year: i16) -> Date {
-    let d: Date = Date { year, month: Month::Feb, day: 6.0 };
+    let d: Date = Date {
+        year,
+        month: Month::Feb,
+        day: 6.0,
+    };
     let (_lng, lichun) = get_last_term(&d);
     lichun
 }
diff --git a/src/time.rs b/src/time.rs
index 132af18..3ec79a5 100644
--- a/src/time.rs
+++ b/src/time.rs
@@ -1,13 +1,8 @@
 #[cfg(test)]
 extern crate approx_eq;
 
-pub use sowngwala::time::{
-    Month,
-    Date,
-    Time,
-    DateTime,
-};
 use sowngwala::time::eot_fortified_ut_from_local;
+pub use sowngwala::time::{Date, DateTime, Month, Time};
 
 pub fn ut_from_local(&dt: &DateTime, zone: i8) -> DateTime {
     eot_fortified_ut_from_local(&dt, zone)
@@ -41,8 +36,7 @@ mod tests {
         assert_eq!(ut.min, 57);
         assert_approx_eq!(
             ut.sec, // 17.137797474861145,
-            17.13779,
-            1e-6
+            17.13779, 1e-6
         );
     }
 }
diff --git a/src/utils.rs b/src/utils.rs
index 04641c5..6e892bb 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,5 +1,5 @@
-use sowngwala::time::Date;
 use sowngwala::sun::ecliptic_position_of_the_sun_from_date;
+use sowngwala::time::Date;
 
 pub fn longitude_of_the_sun_from_date(date: &Date) -> f64 {
     ecliptic_position_of_the_sun_from_date(&date).lng