I think China should import some Moderna and Pfizer, but it should be optional to the population. If they want mRNA vaccines, then they need to pay out of pocket.
Well I wouldn't say no to that if 2 conditions are met.
1. Price is right.
2. When China's 004 and 005 carriers are in service and the Kuznetsov type (001, 002) starts being retired around 2030's.