Just saw this:

https://piao.tips/04fa1ba001/

CAAC will extend 40% capacity control on all US carriers flights to China in May.

Not surprisingly, I just discovered that UA has blocked all ticket sales for UA 857 SFO-PVG in May.

Few hours ago you can buy a J ticket for $19,000. Now you can't even buy that.

Soon UA will start canceling people's tickets and kick them out.