diff --git a/doc/images/wechat_group_1.jpeg b/doc/images/wechat_group_1.jpeg index a7b00324c8f7bfbd1fc09055417ec43e4f807cd5..260a9917028790c1cd58292a4d9f788dba4a9917 100644 Binary files a/doc/images/wechat_group_1.jpeg and b/doc/images/wechat_group_1.jpeg differ