The important things is, we rage war in China and Chinese Sea, at most they can destroy is our proximity asset, and they CAN NEVER TOUCH THE US MAINLAND. However, the war, if they do happen, will be at Chinese soil, we can hit China with our cruise missile, even one cruise missile landed in populated area in China Eastern Seaboard will be more catastrophic than Chinese sinking one of our ship. At most we lose money and life, but on the other hand, China would lose their industrial capability, hence the mean to make money. Ship can rebuild fast, but how long it take to reboot one country's economic, especially that economic is not yet saturated.
Also, do bear in mind, our Bases closest to China does not belong to the US. It's Japan and South Korea, when you are talking about all out war. We would most definitely drag along our allied. The Key to US war is "WE DO NOT FIGHT ALONE", when we are going to war, we muster all our allied together. We have defence pact all over the world. Do bear in mind, in this topic, we assume China fire first, as there are no reason US fire first, and hence we can invoke the Defence pact.
How do you suggest China counter the combine force of US, Japan, South Korea, Taiwan, Philippine, Australia, New Zealand, NATO, when they are all striking back at China? US alone is at least 1 on 1 par with China, some even think 1 on 2 at China, when you also put the force in the aforementioned country, China have no move except eating missile after missile
Or do you really think Chinese Defence are really THAT capable to counter all the strength with us and the allied??
Therefore, Chinese will most definitely think Twice before letting US involve in this kind of situation. Otherwise China will be all but destroyed. As the east coast is what Chinese industrial and economic might will be, a destruction of Chinese east coast will negate all the growth China had in the past 10 years, and will also push Chinese Economic back 10-15 years before the rise.
A war with China inside the Chinese water is very bad to Chinese, especially when the opponent is the US.
, at least 100% "made in China" 
