And which country was the first one to start dropping bombs on other sovereign countries without a UN mandate? If I remember correctly, it was not China. They never dropped a single bomb on any other country.
It's not whataboutism when GP is not-so-subtly accusing China of being the root cause of the problems with the UN. The point it that the problems run much deeper than that.
Also their participation in the Korean War obviously and a bunch of minor skirmishes.