TikTok is surprisingly national at the surface level, but it is all coordinated back with the parent China based entities (ByteDance, Douyin, and the CCP), so that even if it is national, it upholds China’s national interests. See the story at https://news.ycombinator.com/item?id=42739855 for more details. But basically, TikTok executives had to agree to let ByteDance monitor their personal devices, swear oaths to uphold various goals of the CCP (“national unity” “socialism” etc), report to both a US-based manager and a China-based manager, uphold the CCP’s moderation/censorship scheme, and so on. It is REALLY aggressive and unethical, but also reveals how subtly manipulative the entire system of TikTok is.