You're right. Many classes on online education platforms will be stuck, delayed and unclear, especially for startups. They don't invest much in technology, and generally take the third-party live class system, but the effect is not ideal. It's not that the technical ability can't be reached, but that many companies are unwilling to solve the delay problem, and the basic live broadcast is delayed by almost 3 seconds. My Ucloud VIP wants to introduce URTC technology, which can solve the delay problem of live class, with an average delay of 70ms, and people basically have no feeling, which easily solves the problems of jamming, delay and ambiguity in the previous platform, and the number of students has also soared.