diff --git a/README.md b/README.md
index 6a82a8a2a5ac421f777a9473589792bf6937cb4d..2dbf14b4fa8b8e34ca5e2889a3f8931f2a9f5b7b 100644
--- a/README.md
+++ b/README.md
@@ -89,4 +89,8 @@ media文件夹+License
 ##### version 4.1
 
 * 加入其他所有文件
-* 修改虚拟仿真指南(README.md)
\ No newline at end of file
+* 修改虚拟仿真指南(README.md)
+
+**version 4.1.1**
+
+* fork test
\ No newline at end of file
diff --git a/fork_test.txt b/fork_test.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3b18e512dba79e4c8300dd08aeb37f8e728b8dad
--- /dev/null
+++ b/fork_test.txt
@@ -0,0 +1 @@
+hello world