The site of the Chongqing bombing tragedy is a cultural relic protection unit in Chongqing, located in Magnet Street, Yuzhong District, Chongqing. After the fall of Wuhan in 1938, the Japanese invaders marched westward along the Yangtze River to Yichang to spy on Chongqing, and used a large number of air forces day and night to carry out tragic and inhumane quot; fatigue bombing-quot;. On the evening of June 5, 1941, a suffocation tragedy occurred in the Big Anti-aircraft Tunnel at Bichangkou, which shocked China and foreign countries. Overnight, thousands of people died and injured by asphyxiation. This was the most tragic event that happened in the rear during the Anti-Japanese War.