any kind of us-china war that doesn't go nuclear won't exactly be high-casualty conflict. nobody wants to land in china. no matter how good the landing is you'll have to face rapidly mobilising chinese military and unless you manage to break through and take some important port city you'll be outmatched by numbers. so if the us will ever land anywhere it'll be hainan and even that's a stretch. at the same time the chinese can maybe take taiwan, maybe even philippines and will probably try to jump into ryukyu once they get the former. however no matter the situation there's nothing that says "omg look at chinese ship building rate we will be outstripped" thing is permanent. the chinese are expanding the navy but the russian navy is pretty much all rust and not exactly useful, so it's not like the us navy has to be split between different theatres. any power capable of having decently sized navy is allied with them and if it looks bad they'll just start a naval buildup. so the situation at the sea will be, worst case scenario to the us, a match, so there's little likelihood of the chinese getting anything but taiwan and other roc islands in some kind of rapid first strike, before usn can concentrate its fleet in the region. from there on it'll be just about who survives trade war, now with shipping interdiction, something for which you don't have to start a war over.
Poland