The 816 Nuclear Industry Base information is as follows:
The 816 Project Site covers a total area of ??45.2 hectares, with a planned area of ??104,000 square meters in the cave. There are 18 large caverns, roads, guides There are 130 caves, branch tunnels, tunnels and shafts, and the axial length of all caves exceeds 20 kilometers. Among them, the largest cavern is 79.6 meters high, the side wall excavation span is 25.2 meters, and the vault span is 31.2 meters, with an area of ??13,000 square meters.
Architectural features: The entrance depth of the factory building in the cave of the 816 Project Site is about 400 meters, the top covering layer is up to 200 meters thick, and the covering layer thickness of the core factory buildings is more than 150 meters. The 816 hole can prevent the aerial explosion impact of a 1 million-ton hydrogen bomb and the direct hit attack of a 1,000-pound bomb, and can withstand the damage of an 8-magnitude earthquake.
China Industrial Heritage Protection List
The axial stacking length of the 816 project site is more than 20 kilometers, completely hidden inside the mountain. The cave is warm in winter and cool in summer, with constant temperature in all seasons. The total construction area is 104,000 square meters. The main cave is 79.6 meters high and the vault span is 31.2 meters. There are 18 large caves in the cave and more than 130 roads, guide tunnels, branch tunnels, tunnels and shafts. The architectural layout is like a maze. , there is a hole in the hole, there is a building in the hole, there is a hole in the building.
In December 2009, the 816 Project site was listed as a cultural relic protection unit in Chongqing. On December 2, 2017, the 816 Project site was included in the "Second Batch of China's 20th Century Architectural Heritage" list. On January 27, 2018, Project 816 (816 Scenic Area) was selected into the "China Industrial Heritage Protection List". On July 29, 2019, it was rated as a national AAAA tourist attraction.