THE China-developed app Tik Tok has emerged as a world beater,becoming the most downloaded app on Apple’s Store for five consecutive quarters as of May 2019.The app that features sharing short personalized fun videos has repeatedly topped the list of downloads in Japan,the U.S.,Thailand,Indonesia,India,Germany,France,and Russia.Tik Tok,and its applications,is just one manifestation of the growing number of Internet companies in China that have begun to expand overseas.