https://blog.wongcw.com/2018/12/01/%e5%be%ae%e4%bf%a1wechat-%e9%9b%bb%e8%85%a6%e7%89%88v2-6-6-28-2-3-20-for-win-mac-%e6%ad%a3%e5%bc%8f%e7%89%88/