diff --git a/docs/zh_CN/product_documents/m5stack-core/m5core_basic.md b/docs/zh_CN/product_documents/m5stack-core/m5core_basic.md
index 69c32aa7..b92a2fcf 100644
--- a/docs/zh_CN/product_documents/m5stack-core/m5core_basic.md
+++ b/docs/zh_CN/product_documents/m5stack-core/m5core_basic.md
@@ -189,11 +189,11 @@
 -  Type-C USB 线
 -  说明书
 
-<img src="assets/img/product_pics/core/basic/basic_06.jpg" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_07.jpg" width="250" height="250">
+<img src="assets/img/product_pics/core/basic/basic_06.JPG" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_07.JPG" width="250" height="250">
 
-<img src="assets/img/product_pics/core/basic/basic_08.jpg" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_09.jpg" width="250" height="250">
+<img src="assets/img/product_pics/core/basic/basic_08.JPG" width="250" height="250"> <img src="assets/img/product_pics/core/basic/basic_09.JPG" width="250" height="250">
 
-<img src="assets/img/product_pics/core/basic/basic_10.jpg" width="50%" height="50%">
+<img src="assets/img/product_pics/core/basic/basic_10.JPG" width="50%" height="50%">
 
 
 <!-- <figure>