diff --git a/B/7/index.html b/B/7/index.html
new file mode 100644
index 000000000..3b52f2ea7
--- /dev/null
+++ b/B/7/index.html
@@ -0,0 +1,41 @@
+<!--
+ * @Author: chenxuan
+ * @Date: 2022-01-15 19:51:19
+ * @LastEditTime: 2022-01-15 19:56:39
+ * @LastEditors: chenxuan
+-->
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+</head>
+<body>
+    <div id="app"></div>
+	<script src="../package/old/react.development.js"></script>
+    <script src="../package/old/react-dom.development.js"></script>
+    <script src="../package/old/babel.min.js"></script>
+    <script type="text/babel">
+    	class Time extends React.Component{
+            state={date:new Date()}
+            render(){
+                return (
+                    <div>
+                        <h1>hello!</h1>
+                        <input type="text"/>
+                        <span>现在是：{this.state.date.toTimeString()}</span>
+                    </div>
+                )
+            }
+            componentDidMount(){
+                setInterval(()=>{
+                    this.setState({date:new Date()})
+                },1000)
+            }
+        }
+        ReactDOM.render(<Time/>,document.getElementById('app'))
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/B/7/read.text b/B/7/read.text
new file mode 100644
index 000000000..b32c6a441
--- /dev/null
+++ b/B/7/read.text
@@ -0,0 +1,2 @@
+1、diffing算法
+2、循环时key的原理
\ No newline at end of file
diff --git a/高阶函数/exercise9/src/App.js b/高阶函数/exercise9/src/App.js
index 135071372..03fdc75ff 100644
--- a/高阶函数/exercise9/src/App.js
+++ b/高阶函数/exercise9/src/App.js
@@ -1,6 +1,13 @@
+/*
+ * @Author: chenxuan
+ * @Date: 2021-11-21 15:55:16
+ * @LastEditTime: 2022-01-15 00:21:58
+ * @LastEditors: chenxuan
+ */
 import React from 'react'
 import proxyHoc from './components/proxyHoc'
 const Chenxuan=proxyHoc((props)=>{
+  console.log(props)
   return(
     <div>
       <h1>{props.title}</h1>
@@ -17,7 +24,7 @@ class App extends React.Component{
   render(){
     return(
       <div>
-        <Chenxuan title="xxxxx" id="66666"></Chenxuan>
+        <Chenxuan title="xxxxx1" id="66666" hehe="xxxx"></Chenxuan>
       </div>
     )
   }
diff --git a/高阶函数/exercise9/src/components/proxyHoc.js b/高阶函数/exercise9/src/components/proxyHoc.js
index 481f370b7..66d62609a 100644
--- a/高阶函数/exercise9/src/components/proxyHoc.js
+++ b/高阶函数/exercise9/src/components/proxyHoc.js
@@ -1,10 +1,16 @@
+/*
+ * @Author: chenxuan
+ * @Date: 2021-11-21 15:55:16
+ * @LastEditTime: 2022-01-15 00:19:25
+ * @LastEditors: chenxuan
+ */
 import React from 'react'
 function Hehe(WithComponent){
     return class HocComponent extends React.Component{
         constructor(){
             super();
             this.state={
-                userName:""
+                userName:"666"
             }
         }
         setUsername(e){
@@ -17,9 +23,8 @@ function Hehe(WithComponent){
                     value:this.state.userName
                 }
             };
-            
+            console.log(this.props)
             return(
-               
                 <React.Fragment>
                      <li>{this.state.userName}</li>
                     <WithComponent