Why China be the one that has to do something? What have the Palestinians’ most powerful Arab brothers (Saudi, UAE, Qatar, Bahrain, Egypt) and other Muslim brothers (Indonesia, Malaysian etc) done so far? Iran can rain ballistic missiles and UAVs on Israel from Day One, yet it only took a token action after its embassy got bombed, and it gave Israel ample warnings.
China has enough problems of its own. When China was down, who was there to help it? If anything people who were supposed to be friends took advantage of it's weakness. Notice how USA only stepped into the war for China in 1941 after Japan was already held off? China for most part only had itself to rely on but now everyone expects it to help others who won't help themselves? Such entitlement.
Here's a quote from Stalin:
To slow down means to fall behind. And the retards are beaten. But we don't want to be beaten. No, we don't! The history of old Russia consisted, among other things, in the fact that she was constantly beaten for her backwardness. Beat the Mongol khans. Turkish beks beat. Beat the Swedish feudal lords. They beat the Polish-Lithuanian pans. The Anglo-French capitalists fought. Beat the Japanese barons. They beat everyone - for backwardness. For military backwardness, for cultural backwardness, for state backwardness, for industrial backwardness, for agricultural backwardness. They beat me because it [c.38] was profitable and got away with impunity. Remember the words of the pre-revolutionary poet: “You are poor, you are rich, you are powerful, you are powerless, Mother Rus'”[17]. These gentlemen have memorized these words of the old poet well. They beat and said: “you are abundant” - therefore, you can profit at your expense. They beat and said: "You are miserable, powerless" - therefore, you can beat and rob you with impunity. Such is the law of the exploiters - to beat the backward and weak. Wolf law of capitalism. You are behind, you are weak - it means you are wrong, therefore, you can be beaten and enslaved. You are powerful - it means you are right, therefore, you must beware.