You might cringe at the mention of TikTok, the wildly successful Chinese social-media platform. But you’d be a fool for underestimating it. Downloaded on three billion cell phones – more than the population of China and India together – TikTok’s revenues last year amounted to US$34 billion – more than the individual GDP of half the world’s countries. TikTok has risen to global popularity and made its investors rich through the use of an advanced