EDIT: Darn, kind of beat to the thought again today. I should learn to type faster.

Talk of Wal-Mart and Target aside, neither nation would want problems between them, which is why more or less rhetoric from both the US and China to each other has been markedly toned down for a while. Even in this case the responses from officials from both China and the US have been quite subdued, in myopinion.
China may have a ton of exports going to the US, but the US is also their chief debtor -- the currency which the Chinese would prefer not to move wildly is the American dollar. A while back, when a Treasury Official said "Currency manipulation" they went insane for that reason. That credit is a chief part of China's financial standing and destabilizing it would be a massive problem for the Chinese as well as the Americans. It doesn't matter which side would be hurt first or hurt more, neither side wants that to happen at the moment since what would happen would have ramifications far beyond what they could tolerate.
I remember a comic I saw some time ago by an American political cartoonist, which explained the modern (possibly economic-oriented, I honestly forget the specifics) relationship of China in three steps. The first was suspicious looks, the second was a tentative handshake, and the third had Uncle Sam's hand thrust into the chest of the Chinese Dragon with surprised looks on both of their faces. That representation of the codependency present between the two nations is one I've always through back to because it represents a situation inherent to current China-American relations, and is one of the reasons why China is willing to finance American debt. I'm not saying this is a permanent solution or that we won't see changes, I just think it's kind of jumping the gun to say one side will suffer more and hence the other side would see it as worth it. At the moment, both sides right now would suffer more than they could tolerate, imo -- and whether things remain that congenial, improve, or what have you in the future, I have zero clue.
$1:
Why do they need to deploy missles? Couple of nuke subs parked on their front door not enough?
The article mentions that it contradicts aims to reduce nuclear armament, since they replaced those Trident warheads with this setup specifically. The rest is just increasing “presence” to make the other folks in the region less antsy about China and more secure overall, as is mentioned in the article and likely as evidenced by the locations of these new subs, but the latter bit is just my mind going for a bit of a wander.