Introduction to War Preparation Cave: "War Preparation Cave", also known as "Leifeng Cave", was originally built in the 1950s and 1960s. The cave is 1,635 meters long, covers an area of ​​3,746 square meters, and has 96 rooms. It is a unique wartime cave. Important facilities for commanding combat functions, the cave is fully equipped with water supply, power supply, heating and communications, enough for 600 people to live inside for half a year. Nowadays, the facilities in the cave have been abandoned, and we can only imagine the history of that year from the scale of the cave.