diff --git a/docs/en/unit/button.md b/docs/en/unit/button.md
index 141d6f62..94b673c6 100644
--- a/docs/en/unit/button.md
+++ b/docs/en/unit/button.md
@@ -24,9 +24,34 @@ The Unit BUTTON is a sigle-button unit that can be detected whether the button p
 ## Example
 
 ```arduino
-float tmp = dht12.readTemperature();//temperature
-float hum = dht12.readHumidity();//humidity
-float pressure = bme.readPressure();//pressure
+#include <M5Stack.h>
+void setup() {
+  // init lcd
+  M5.begin();
+  pinMode(36, INPUT);
+  M5.Lcd.clear(BLACK);
+  M5.Lcd.setTextColor(YELLOW);
+  M5.Lcd.setTextSize(2);
+  M5.Lcd.setCursor(65, 10);
+  M5.Lcd.println("Button example");
+  M5.Lcd.setTextColor(RED);
+}
+
+void loop() {
+  M5.update();
+
+  if(digitalRead(36)==0)
+  {
+    while(1)
+    {
+      if(digitalRead(36)==1)
+      {
+        M5.Lcd.print("1");
+        break;
+      }
+    }
+  }
+}
 ```
 
 Click [here](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/BUTTON/Arduino)for Specific example.
diff --git a/docs/zh_CN/README.md b/docs/zh_CN/README.md
index dd632f24..014482c3 100644
--- a/docs/zh_CN/README.md
+++ b/docs/zh_CN/README.md
@@ -88,8 +88,7 @@
 
 <!-- [![M5GO_Unit_rgb.png](https://i.loli.net/2018/12/13/5c121f5c98542.png)](zh_CN/unit/rgb)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![M5GO_Unit_relay.png](https://i.loli.net/2018/12/13/5c121f6e9a185.png)](zh_CN/unit/relay)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![M5GO_Unit_neopixel.png](https://i.loli.net/2018/12/13/5c121f8457fcb.png)](zh_CN/unit/neopixel) -->
 
-[![unit_hub.png](https://img-blog.csdnimg.cn/20181211174142806.png)](zh_CN/unit/hub)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![unit_3.96.png](https://img-blog.csdnimg.cn/20181211174154240.png)](zh_CN/unit/396port)
-[![unit_proto.png](https://img-blog.csdnimg.cn/20181211175313832.png)](zh_CN/unit/proto)
+[![unit_hub.png](https://img-blog.csdnimg.cn/20181211174142806.png)](zh_CN/unit/hub)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![unit_396port.png](https://img-blog.csdnimg.cn/20181211174154240.png)](zh_CN/unit/396port)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![unit_proto.png](https://img-blog.csdnimg.cn/20181211175313832.png)](zh_CN/unit/proto)
 
 <!-- [![unit_hub.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/docs/assets/img/product_pics/pictures_for_homepage/units/unit_hub.png)](zh_CN/unit/hub)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[![unit_3.96.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/docs/assets/img/product_pics/pictures_for_homepage/units/unit_396port.png)](zh_CN/unit/396port)
 [![unit_proto.png](http://m5-docs.oss-cn-shenzhen.aliyuncs.com/docs/assets/img/product_pics/pictures_for_homepage/units/unit_proto.png)](zh_CN/unit/proto) -->