What's the background for U.S. National Security Advisor Jake Sullivan's China trip?

①U.S. National Security Advisor Jake Sullivan is visiting China from Tuesday to Thursday. What's the background? (00:50) ②Israel claims Hezbollah's missile barrage has failed to hit any of its military bases. What's at stake after recent exchanges of fire between the two sides? (12:50) ③U.S. Federal Reserve Chair Jerome Powell signaled that an interest rate cut is imminent in a keynote address at the Jackson Hole symposium.(25:20) ④French police have arrested Telegram founder Pavel Durov at an airport outside Paris.(36:40) ⑤NASA has decided to return Boeing's Starliner astronauts from space next year.(45:40)