diff --git a/doc/images/wechat_group_1.jpeg b/doc/images/wechat_group_1.jpeg index 9259862d82879075dd40ca8243a58f049378c887..069ebd42e06e56d7d33c575e36fc953a2e4c0488 100644 Binary files a/doc/images/wechat_group_1.jpeg and b/doc/images/wechat_group_1.jpeg differ