上車舞 rose to fame on Douyin, the Chinese version of TikTok, as a group dance-challenge and forfeit song. The routine is simple: dancers chant 'shang che luo' (get on board) and mime climbing into a car with bouncing arm moves, which made it a go-to punishment dance for game losers and a staple of party videos. The catchy hook travelled from Douyin to international TikTok, where Chinese-speaking creators and dance accounts keep the challenge alive in reunions, celebrations and comedy sketches.