There are no eternal enemies and no eternal friends. According to the changes in the international situation, enemies can become friends and friends can also become enemies. China and the United States, the G8 is the enemy, and then the return of money can be regarded as friends. World War I and World War II were allies, and after World War II they were enemies in the Korean War and McCarthyism. Later, in order to fight against the Soviet Union, China and the United States became friends again. It keeps changing.