An example is very telling, that is, the attitude of the United States towards civilians in the Vietnam War and China's counterattack against Vietnam. In the two wars, because of the strength of Vietnam, civilians were soldiers, and soldiers dragged down their military uniforms were civilians. In fact, in the middle and late period of the war, the attitude of the United States and China towards Vietnamese civilians was basically the same, that is, the first move was the strongest. However, in China, people think that the Americans massacred in Vietnam, while the China soldiers defended themselves. Of course, China didn't commit mass killings like the United States.