diff --git a/docs/zh_CN/product_documents.md b/docs/zh_CN/product_documents.md
index ae1fd9e5..5e962f8c 100644
--- a/docs/zh_CN/product_documents.md
+++ b/docs/zh_CN/product_documents.md
@@ -6,7 +6,7 @@
 
 **主控M5Core**
 
-[![](https://img-blog.csdnimg.cn/20181210155042186.jpg)](zh_CN/product_documents/m5stack-core/m5core_basic)[![FNpWbd.jpg](https://s1.ax1x.com/2018/12/13/FNpWbd.jpg)](zh_CN/product_documents/m5stack-core/m5core_gray)[![](https://img-blog.csdnimg.cn/20181210155059380.jpg)](zh_CN/product_documents/m5stack-core/m5core_gray) [![](https://img-blog.csdnimg.cn/20181210155116910.jpg)](zh_CN/product_documents/m5stack-core/m5core_fire)
+[![basic_01.jpg](https://i.loli.net/2018/12/13/5c121478df534.jpg)](zh_CN/product_documents/m5stack-core/m5core_basic)[![FNpWbd.jpg](https://s1.ax1x.com/2018/12/13/FNpWbd.jpg)](zh_CN/product_documents/m5stack-core/m5core_gray)[![](https://img-blog.csdnimg.cn/20181210155059380.jpg)](zh_CN/product_documents/m5stack-core/m5core_gray) [![](https://img-blog.csdnimg.cn/20181210155116910.jpg)](zh_CN/product_documents/m5stack-core/m5core_fire)
 
 **MiniCore**