diff --git a/doc/images/wechat_group_1.jpeg b/doc/images/wechat_group_1.jpeg
index 069ebd42e06e56d7d33c575e36fc953a2e4c0488..7368e20ae84784adf1c96c4f9c12f08cada169ec 100644
Binary files a/doc/images/wechat_group_1.jpeg and b/doc/images/wechat_group_1.jpeg differ