If China is really a country that only cares about its own interests, then now all the oil fields in Venezuela have been on fire, and countless refugees and drug traffickers are looking for ships to sneak into the United States.
China did not do so because it is essentially a country that pursues order and dislikes chaos, and does not want to see Venezuelans fall into a humanitarian disaster.
Now that the United States has violated international law and invaded Venezuela, it has a responsibility to maintain order in Venezuela. If there is a war or humanitarian disaster in Venezuela in the future, there is no doubt that it is caused by the United States.