diff --git a/README.md b/README.md
index e4edbca3..5690be7c 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
-
+
@@ -377,7 +377,7 @@ TODO
- 🗹 Recognition of `index` and `list` in the main text
- 🗹 Table recognition
- ☐ Code block recognition in the main text
-- ☐ [Chemical formula recognition](old_docs/chemical_knowledge_introduction/introduction.pdf)
+- ☐ [Chemical formula recognition](docs/chemical_knowledge_introduction/introduction.pdf)
- ☐ Geometric shape recognition
# Known Issues
diff --git a/README_zh-CN.md b/README_zh-CN.md
index a7d8dc04..bf6e802b 100644
--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -1,7 +1,7 @@
-
+
@@ -381,7 +381,7 @@ TODO
- 🗹 正文中目录、列表识别
- 🗹 表格识别
- ☐ 正文中代码块识别
-- ☐ [化学式识别](old_docs/chemical_knowledge_introduction/introduction.pdf)
+- ☐ [化学式识别](docs/chemical_knowledge_introduction/introduction.pdf)
- ☐ 几何图形识别
# Known Issues
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