Seventy-three years ago today, on July 12, 1952 (May 21, 1952), Zhou Enlai issued a statement expressing serious protest against the provocative acts of US aircraft invading China's airspace. At 13:57 on July 11, 1952, 8 F-86 fighter jets of the US Air Force invaded the airspace of Andong in northeastern China, killing and injuring 49 peaceful residents. On the same day, US aircraft carried out 746 large-scale bombardment of industrial facilities and supply bases in Pyongyang, Huangzhou and Shariwon areas. At 23:00 on the same day, US aircraft bombed the No. 9 POW Battalion in Mohyeonri, North Korea, killing 13 prisoners of war, wounding 72, and missing 25. On the 12th, Foreign Minister Zhou Enlai of the People's Republic of China issued a statement expressing serious protest against the provocative acts of US aircraft invading China's airspace and killing and injuring Chinese peaceful residents. He pointed out: This is another serious and direct provocative act against the Chinese people by the US government after its large-scale bacteriological war against the northeast of our country. This provocative act "has already caused a more serious situation in the Far East, and the US government should bear full responsibility for all the consequences arising from this serious situation." All the prisoners in the No. 9 POW Camp of the Chinese and North Korean sides, which was bombed by US aircraft, held a conference to protest the crime of the US bombing the prisoner camp. The protest letter unanimously adopted by the conference stated: We firmly demand that the US authorities ensure that such atrocities will not be committed in the future, and the issue of the repatriation of prisoners of war will be resolved on the basis of the Geneva Convention, and the Korean War will be We demand that they stop violating our just demand to return home early and live in peace.