diff --git a/pages/API/buffer/buffer.js b/pages/API/buffer/buffer.js
new file mode 100644
index 0000000..e1c892f
--- /dev/null
+++ b/pages/API/buffer/buffer.js
@@ -0,0 +1,16 @@
+// pages/API/get-network-type/get-network-type.js
+Page({
+  data: {
+    result: ''
+  },
+  testBuffer() {
+    const base64 = 'CxYh'
+    const arrayBuffer = wx.base64ToArrayBuffer(base64)
+    console.log('call wx.base64ToArrayBuffer', arrayBuffer);
+    const base64res = wx.arrayBufferToBase64(arrayBuffer)
+    console.log('call wx.arrayBufferToBase64', base64res);
+    this.setData({
+      result: base64res
+    });
+  }
+})
diff --git a/pages/API/buffer/buffer.json b/pages/API/buffer/buffer.json
new file mode 100644
index 0000000..3323b3c
--- /dev/null
+++ b/pages/API/buffer/buffer.json
@@ -0,0 +1,3 @@
+{
+  "navigationBarTitleText": "获取手机网络状态"
+}
\ No newline at end of file
diff --git a/pages/API/buffer/buffer.wxml b/pages/API/buffer/buffer.wxml
new file mode 100644
index 0000000..3c30d24
--- /dev/null
+++ b/pages/API/buffer/buffer.wxml
@@ -0,0 +1,21 @@
+<!--pages/API/get-network-type/get-network-type.wxml-->
+<import src="../../common/head.wxml" />
+<import src="../../common/foot.wxml" />
+
+<view class="container">
+  <template is="head" data="{{title: 'getNetworkType'}}"/>
+
+  <view class="page-body">
+    <view class="page-section">
+      <view>这个按钮先调用 wx.base64ToArrayBuffer 将 base64 转换成 ArrayBuffer ， 在调用 wx.arrayBufferToBase64 对象转成 Base64 字符串</view>
+      <view>点击btn 如果result结果是 'CxYh' 说明调用成功</view>
+      <view>result {{result}}</view>
+      <view class="btn-area">
+        <button type="primary" bindtap="testBuffer">test {{result}}</button>
+      </view>
+    </view>
+  </view>
+
+  <template is="foot" />
+</view>
+
diff --git a/pages/API/buffer/buffer.wxss b/pages/API/buffer/buffer.wxss
new file mode 100644
index 0000000..c30c532
--- /dev/null
+++ b/pages/API/buffer/buffer.wxss
@@ -0,0 +1,8 @@
+/* pages/API/get-network-type/get-network-type.wxss */
+.page-body-info {
+  height: 100px;
+}
+.page-body-text-network-type {
+  font-size: 40px;
+  font-family: -apple-system-font,Helvetica Neue,Helvetica,sans-serif;
+}
diff --git a/pages/API/index/index.js b/pages/API/index/index.js
index 508e634..d8f0ae0 100644
--- a/pages/API/index/index.js
+++ b/pages/API/index/index.js
@@ -6,7 +6,15 @@ Page({
     }
   },
   data: {
-    list: [
+    list: [{
+      id: 'base',
+      name: '基础',
+      open: false,
+      pages: [{
+        zh: 'buffer',
+        url: 'buffer/buffer'
+      },],
+    },
       {
         id: 'page',
         name: '界面',
diff --git a/pages/API/index/resources/kind/base.png b/pages/API/index/resources/kind/base.png
new file mode 100644
index 0000000..1ff282c
Binary files /dev/null and b/pages/API/index/resources/kind/base.png differ
diff --git a/project.config.json b/project.config.json
index 42ae44d..f581980 100644
--- a/project.config.json
+++ b/project.config.json
@@ -40,7 +40,7 @@
   },
   "compileType": "miniprogram",
   "libVersion": "2.14.1",
-  "appid": "wx60509bbad6b495c2",
+  "appid": "wx723eeedb1222c3c8",
   "projectname": "wx-api-v2",
   "debugOptions": {
     "hidedInDevtools": []