Their submarine force is a generation behind. OTOH, the USN still has a lot of 688's in service, and I hear numbers are going to fall before they start getting better. They Virginnia's are probably far better than any Chinese Submarine. But they cant be several places at once. Even worse, the USN's FFG fleet is currently non existent, other than a couple of trials ships. If they started a commerce war, America would have to lean heavily on its allies to stop them.
Im not sure its as easy to sink carriers as the Chinese think. It may well be possible to sink carriers using hypersonic weapons. OTOH, nobody has yet demonstrated an ability to do so. It one thing to use a hypersonic missile against a static target. Carriers move. The only really reliable way to do it is still a nuclear warhead, and doing that is going to cause a number of problems to put it mildly.
Edited by Stuart Galbraith, 07 January 2019 - 1300 PM.