Diplomatic constructs, like the 'One China' policy, can provide a useful transitional context in particularly difficult situations, but there is a point when the rest of the world cannot be expected to remain aligned around evident deeply rooted dysfunction.

I'm not sure if Trump is a bull in a china shop or a bull in the barn yard.  But he is a bull, and the outgoing lamb does not have much to show on the China file after 8 years in the Oval office.