In only five years, TikTok has gained millions of fans around the world and become a source of geopolitical tension between the U.S. and China. We spoke to people who witnessed the app’s meteoric rise firsthand: influencers, former workers, and a government official who is concerned about TikTok’s data practices. Further Listening -Why TikTok’s Under Investigation  -Why Everyone is Mad At Instagram  Learn more about your ad choices. Visit megaphone.fm/adchoices