The point is rite now, world is unipolar. US dominates the world politics. China and Russia take different stands on various issues but find no buyers.
Various nations included signed CTBT including China which means that all the nations who signed have agreed to US dominance according to communist of India. Infact, China legally is so vulnerable that tomorrow, China is found of nuclear proliferation, US can impose heavy economic sanctions alienating it from the rest of the world.