diff --git a/docs/tutorial-basics/pic/301h.jpg b/docs/tutorial-basics/pic/301h.jpg
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diff --git a/docs/tutorial-basics/pic/301h2.png b/docs/tutorial-basics/pic/301h2.png
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diff --git a/docs/tutorial-basics/usb-flash.md b/docs/tutorial-basics/usb-flash.md
index 8f81903..ae8ccdf 100644
--- a/docs/tutorial-basics/usb-flash.md
+++ b/docs/tutorial-basics/usb-flash.md
@@ -84,10 +84,13 @@ hi3798mv200的通用短接办法：
 :::tip
 hi3798mv300的盒子目前没有发现通用的短接办法，  
 目前只发现一款盒子，移动的魔百盒 301H 如下图：  
+短接 c46 （用镊子把这个贴片的两端轻轻而又稳稳地夹住）  
+小心别太用力，注意别损坏！
 :::
 ![usbformat](pic/301h.jpg)  
+![usbformat](pic/301h2.png)  
 
-
+### 开始刷机
 
 
 ##  知识点