diff --git a/doc/images/wechat_group_1.jpeg b/doc/images/wechat_group_1.jpeg
index 4e618531459a513afcd16a852a5ac01201df15e9..443a1549d5c79e86b26038d7eb2e704ed5f9213f 100644
Binary files a/doc/images/wechat_group_1.jpeg and b/doc/images/wechat_group_1.jpeg differ