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作用：用来实时检测自己关注网站的更新动态很有帮助，提醒方式支持：浏览器弹窗提醒、邮件提醒、微信提醒。
官网地址：https://courier.toptopn.com/ 邀请码：https://courier.toptopn.com/?from=i&c=2859
感觉自己实现也没难度
@malaohu
