diff --git a/docs/hardware/zh/lichee/RV_Nano/5_peripheral.md b/docs/hardware/zh/lichee/RV_Nano/5_peripheral.md
index 3186216991..256639f6ec 100644
--- a/docs/hardware/zh/lichee/RV_Nano/5_peripheral.md
+++ b/docs/hardware/zh/lichee/RV_Nano/5_peripheral.md
@@ -10,8 +10,6 @@ update:
 ## 引脚分布
 ![](./../assets/RV_Nano/intro/RV_Nano_3.jpg)
 
-## 连接到板子
-
 ### UART0
 
 将UART串口连接到板子的:
@@ -246,10 +244,3 @@ echo 1 | evtest
 ```
 
 然后按下USER按键，可以在终端看到对应的事件报告
-
-
-## 声音
-
-```
-/opt/audio.sh 1 # 录音一秒然后播放
-```