Tik Tok美国区在19日下线，然后20日又可以重新使用了。 它的弹窗说明写得也非常艺术： 弹窗顶部是 TikTok 的彩色 logo，下面写着 “Welcome back!”（ ...

TikTok is back online less than 15 hours after shutting down. Why is TikTok working again? Are they still banned in the U.S.? Here’s what you need to know.