Missile depot introduction: Chariots, horses and artillery tanks can drive into the cave. You can fully feel the grandeur of the grand national defense project. You can see anti-impact doors, anti-leakage and anti-seepage doors, closed doors, and escape from disasters. The access door is a suspended hole with extremely high craftsmanship. It has constant temperature and moisture-proof functions. You can hear the sound of rocks and water flowing below 100 meters.