diff --git a/code/ts/后端辅助工具/src/DataType/Class.ts b/code/ts/后端辅助工具/src/DataType/Class.ts
index 3b5d78d..d76c054 100644
--- a/code/ts/后端辅助工具/src/DataType/Class.ts
+++ b/code/ts/后端辅助工具/src/DataType/Class.ts
@@ -37,4 +37,14 @@ class CpicximStuff
     }
 };
 
-export { CpicximStuff };
\ No newline at end of file
+class A 
+{
+    public static _x: string = "A";
+}
+
+class B extends A 
+{
+
+}
+
+export { CpicximStuff, A, B };
\ No newline at end of file
diff --git a/code/ts/后端辅助工具/src/main.ts b/code/ts/后端辅助工具/src/main.ts
index 2d1c476..f266ebd 100644
--- a/code/ts/后端辅助工具/src/main.ts
+++ b/code/ts/后端辅助工具/src/main.ts
@@ -2,7 +2,7 @@
  * @Author: Kane
  * @Date: 2023-02-09 22:14:30
  * @LastEditors: Kane
- * @LastEditTime: 2023-02-14 22:36:54
+ * @LastEditTime: 2023-02-20 00:19:23
  * @FilePath: /后端辅助工具/src/main.ts
  * @Description: 
  * 
@@ -11,11 +11,22 @@
 
 import dataTypes from "./DataType/DataType";
 import { pakoTest } from "./gzip/PakoTest";
+import {A,B} from "./DataType/Class";
 
 const greetings = "hello, this is kane's typescript!";
 
 console.log(greetings);
 console.log("all");
 
+const _a:A = new A();
+const _b:B = new B();
+
+B._x = "B";
+
+console.log(A._x);
+console.log(B._x);
+
+
+
 //dataTypes();
 pakoTest();