diff --git a/docs/tutorial-basics/pic/ec6108v9c.jpg b/docs/tutorial-basics/pic/ec6108v9c.jpg
new file mode 100644
index 0000000..9b468df
Binary files /dev/null and b/docs/tutorial-basics/pic/ec6108v9c.jpg differ
diff --git a/docs/tutorial-basics/pic/ec6108v9c.png b/docs/tutorial-basics/pic/ec6108v9c.png
deleted file mode 100644
index 4340329..0000000
Binary files a/docs/tutorial-basics/pic/ec6108v9c.png and /dev/null differ
diff --git a/docs/tutorial-basics/pic/unt400b.jpg b/docs/tutorial-basics/pic/unt400b.jpg
new file mode 100644
index 0000000..c4769c8
Binary files /dev/null and b/docs/tutorial-basics/pic/unt400b.jpg differ
diff --git a/docs/tutorial-basics/pic/unt400b.png b/docs/tutorial-basics/pic/unt400b.png
deleted file mode 100644
index f7616f2..0000000
Binary files a/docs/tutorial-basics/pic/unt400b.png and /dev/null differ
diff --git a/docs/tutorial-basics/usb-flash.md b/docs/tutorial-basics/usb-flash.md
index 45f3d3a..0d0abdf 100644
--- a/docs/tutorial-basics/usb-flash.md
+++ b/docs/tutorial-basics/usb-flash.md
@@ -71,10 +71,10 @@ CPU 右上角的 1，2 脚 短接法：
 华为悦盒 ec6108v9 短接 J15  
 注意：如果你发现自己的ec6108v9板子是J16 请使用mdmo1g的刷机包。（部分商家外壳标识不规范）  
  
-![pic](pic/ec6108v9c.png)  
+![pic](pic/ec6108v9c.jpg)  
 
 例子 2 ：UNT400B 短接图 （用镊子把这两个孔连上）  
-![pic](pic/unt400b.png)  
+![pic](pic/unt400b.jpg)  
 
 #### hi3798mv200 的盒子
 :::tip