这使我根据微信手机端APP 7.0的官方升级版本做的pc端改版（精简/收起版），仅做练习，不代表官方立场。This made me do the PC version revision exercise according to the official upgrade version 7.0 of WeChat mobile APP, including some thinking of ue, which does not represent the official position.hope you like it,cheers~
