diff --git a/doc/images/wechat_group_1.jpeg b/doc/images/wechat_group_1.jpeg index e9440f3d3f2f832881f62d6bab38d3594e9b2ff6..daa619adaea3c86e7e43180ef92551cb992332af 100644 Binary files a/doc/images/wechat_group_1.jpeg and b/doc/images/wechat_group_1.jpeg differ