diff --git a/projects/Compilers.md b/projects/Compilers.md
index 814fe26..ff6a601 100644
--- a/projects/Compilers.md
+++ b/projects/Compilers.md
@@ -14,6 +14,7 @@
 * [Jray](https://github.com/Jraaay/LexParser) (C++)
 * [Sduby](https://github.com/Sduby22/compiling_hw/tree/main/lab1-clexer) (C & flex)
 * [BUPT-CS-Assignment](https://github.com/BUPT-CS-Assignment/Lexer) (C++)
+* [YangChen-pro](https://github.com/YangChen-pro/bupt-assignments/tree/main/3rd%20year%20of%20BUPT/First%20semester/Compilation/lexical%20analysis) (C++ & Lex)
 
 ### 语法分析
 
@@ -29,6 +30,7 @@
 * [Jray](https://github.com/Jraaay/SyntaxAnalyzer) (C++)
 * [Sduby](https://github.com/Sduby22/compiling_hw/tree/main/lab2-yacc) (C)
 * [BUPT-CS-Assignment](https://github.com/BUPT-CS-Assignment/SyntaxAnalyzer) (C++)
+* [YangChen-pro](https://github.com/YangChen-pro/bupt-assignments/tree/main/3rd%20year%20of%20BUPT/First%20semester/Compilation/grammar%20analysis) (Python & Yacc)
 
 ### 语义分析
 
diff --git a/projects/Operating-Systems.md b/projects/Operating-Systems.md
index 6913e7d..5769afc 100644
--- a/projects/Operating-Systems.md
+++ b/projects/Operating-Systems.md
@@ -3,3 +3,4 @@
 ### 操作系统实验（叶文）
 
 - [name1e5s](https://github.com/name1e5s/playground/tree/master/OS-Lab) (Assembly & C)
+- [YangChen-pro](https://github.com/YangChen-pro/bupt-assignments/tree/main/3rd%20year%20of%20BUPT/First%20semester/Operating%20system) (C)
diff --git a/projects/Python.md b/projects/Python.md
index 0db937a..37cc04e 100644
--- a/projects/Python.md
+++ b/projects/Python.md
@@ -1,4 +1,5 @@
 # Python程序设计
 
 ### 2020级
-* [BUPT-CS-Assignment](https://github.com/BUPT-CS-Assignment/Python_Homework_2022) (租房数据分析)
\ No newline at end of file
+* [BUPT-CS-Assignment](https://github.com/BUPT-CS-Assignment/Python_Homework_2022) (租房数据分析)
+* [YangChen-pro](https://github.com/YangChen-pro/bupt-assignments/tree/main/3rd%20year%20of%20BUPT/First%20semester/Python) (链家2022和2023北上广深租房价格分析)