I am not sure everyone within the Biden administration is at the same page. Visiting China isn't the aim. Ultimately, the Biden administration desperately wants to arrange a meeting with Xi.Why Blinken and Sullivan want to visit China so badly, what is the main agenda? what they really really want from China that have a good chance getting it ?
As long as Xi is willing to meet with Biden, then the Biden administration felt that things are under control and they could continue escalating and putting more sanctions or even provoking China in Taiwan strait. Without that and a hotline with Chinese military, the Biden administration is afraid that their provocation would invite a full fledged retaliation from China and a total breakdown of the relationship between two countries. Since the presidential election is near, the Biden administration is urgently trying to reopen the communication as they might anticipate the need to poke China in order to appear tough but that there would be a "misunderstanding".
