China's come out saying it's looking for the peaceful denuclearisation of Korea, which is basically in accordance to American interests too. Even if you think it's all talk, it's only talk because the situation is rather scary and everybody's being cautious. It's in China's best interests to get rid of North Korean nukes so congrats for them declaring it even if it doesn't translate into action quickly. Note that North Korea wants negotiations but their bottom line is to maintain their nuclear capability. So these are strong words indeed.