The slogan "Resist U.S. aggression and aid Korea, protect our country and defend our country" has clearly indicated the purpose of volunteer action. Only the United States stood on the opposite side of North Korea, which naturally became China's ally, and the War to Resist US Aggression and Aid Korea was generally regarded as helping North Korea fight the United States. Although the Korean War was first provoked by North Korea, it cannot deny the justice of China's War to Resist US Aggression and Aid Korea. Before the volunteers entered the DPRK, China was not a combatant. However, the US Navy's Seventh Fleet invaded the Taiwan Province Strait and interfered in China's internal affairs, and the Air Force bombed China's border towns many times. This naked provocation is a serious violation of China's sovereignty. It is morally reasonable for China to send volunteers abroad to fight the invaders.