He told once in a interview he actually tried to work with them until he was told in his own face that all that work he had done for a more fair union amounted to nothing because they (the globalist cabal) would pass the vetoed shit anyway.
I don't think China wants to poke this bear.
If Xi wasn't in power i would agree. Recent events show he might have his back against the wall when he garnered more power for himself.
The border clashes with India and now recently going even against Putin, with the propaganda machine claiming Vladivostok is part of China show that not everything is well in the party and i wouldn't be surprised if he wants Biden to win to ease the pressure on trade because 4 more years of Trump might break the camel's back.
The plebs weren't supposed to game their system.