If one did not already know that the climate deal is against American interests, this statement proves it.
Absolutely. The Chinese statement on the surface is illogical - why would China care about GW, they are by far, and will be in the future also, the biggest emitter of carbon as well as real pollutants?
The answer is that the US/Obama have probably agreed to cut off America's economic nose to spite our face to get an agreement. China is indeed in favor of anything that weakens the USA or ties down the USA multi-laterally.