The Red Army has had an intelligence office located directly in ByteDance headquarters, it goes without saying they’re doing more than just watching someone’s videos.

TikTok has been known to exploit 0-days to evade the Android permissions system and escape OS sandboxing, especially on rooted and/or unlocked phones. This is one of the primary reasons it was banned from government-issued devices in the USA.

It does indeed. I first saw it used online in a Usenet flamewar post back in the 1980’s.