By the time all those 055's and 052D's are in service other forces in the region would have also added assets, and subs and CV/LHD/equivalents are also combatants.
Relatively the PLAN would still not be that large a force when compared to combined USN (mainly 7th but likely also elements of 3rd, 5th, & 6th fleets), JMSDF, ROKN, and ROCN assets, the VPN and PN should probably be included as well in the immediate neighborhood. This is not even taking into account plausible addition of other neighborhood forces the RAN, RMN, TNI-AL, RSN, and RTN. Or the possible involvement from further afield of elements of the IN, RN, MN, RCN, or RNZN. Am I missing any more acronyms?
Realistically in a total war scenario the whole SLOC protection mission is a pipedream for China, it has no chance of being able to do so and probably knows it so they would be focusing on landlines instead (puns intended). The best it could hope for is dominating the seas within the first island chain or contending it enough to prevent significant maritime threats to the homeland.