On the 7th of May, 1952, China protested against the killing of American prisoners of war. On the 7th of May, 1952, during the North Korean ceasefire negotiations, the United States and South Korea carried out a massacre of Chinese prisoners of war. On the 18th of February, 1952, the United States carried out a massacre of North Korean prisoners of war at the 62nd prison camp on Giants Island, where 86 people were killed and wounded, 75 of whom were killed and 139 were wounded; on the 13th of March, the U.S. Army carried out a massacre of Chinese prisoners of war; on the 20th of March, the United States also carried out a massacre of Korean prisoners of war at the Busan camp, where 86 people were killed