Introduction to the air-raid shelter: Due to the sweltering summer in Chongqing, residents near the Shibati Ladder come to the air-raid shelter to enjoy the cool air every time the temperature reaches high temperatures. The cool breeze blows out from the entrance of the cave, making it feel as if they have entered an air-conditioned room, which is very refreshing. Hundreds of mats were spread out on the road more than 100 meters in front of the air-raid shelter, and some people even came to grab a seat after breakfast. The old man in charge of guarding the air-raid shelter said: "As long as the weather is still hot, we will keep the door open to let people cool off until the weather gets cooler." It is reported that when the air-raid shelter is crowded, many people cannot lie down at all and can only sleep sitting up.