diff --git a/docs/tutorial-basics/n2-ttl-flash.md b/docs/tutorial-basics/n2-ttl-flash.md
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--- a/docs/tutorial-basics/n2-ttl-flash.md
+++ b/docs/tutorial-basics/n2-ttl-flash.md
@@ -64,7 +64,7 @@ sidebar_position: 7
 - 如果你没有小锡焊机，那么就用些技巧，将排针稳稳的靠在盒子主板的GND，TX，RX的小孔上。  
 小孔周边的小铜圈必须要接触到，才算导通哦。作者有时候会用夹子或者镊子；  
 ![ttl](pic/n2-1.jpg)
-
+![ttl](pic/n2-4.jpg)  
 
 ### 第二步：打开hitool软件工具跑码（检查盒子芯片型号参数）
 - 请按照下图的示范，进行跑码操作：  
diff --git a/docs/tutorial-basics/pic/n2-4.jpg b/docs/tutorial-basics/pic/n2-4.jpg
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