Perfect post, applause!
The West doesn't want a negotiation of win-win with 50-50, 50% benefit to US and 50% benefit to China
The US wants only 100-0, 100% to US and 0% to China.
China thinks that for repeatedly calling for talks and negotiations makes it look like a responsible and grown up country. WRONG!
The US, and the West in general, see that as China being WEAK.
Now, China ofc is not losing anything if they waste US' valuable time with talking year by year lol
So if China wants to keep up the game, then I dont see why they should stop now. Xi can keep talking about "win-win", cooperation with the US, friendly negotiations with the US etc., because this is "free" for him. China wont lose anything if it keeps talking and talking forever. As they say, "talk is cheap"