The 816 underground nuclear project scenic spot is located in the hinterland of Jinzishan on the East Bank of Baitao Wujiang River in Fuling, Chongqing. It is adjacent to Baitao River and straddles Wuling Mountain in the southeast. It is the second industrial base of nuclear raw materials in China, i.e. the site of atomic reactor and chemical reprocessing project with the code name "816 Project".            In 1966, Premier Zhou Enlai personally approved the construction of the project, with a total investment of 746 million yuan. By the time the project was suspended in 1984, 85% of the construction projects had been completed. 65% of the installation works. The project is about 20 kilometers long, with 12 main caverns as high as 79.6 meters, and the vault 31.2 meters high. It is totally hidden in the inner part of the mountain. There are 18 large caverns, more than 130 roads, pilot tunnels, branches, tunnels and shafts, and more than 1.5 million cubic meters of earth and rock have been excavated. The layout of the whole cave is like a labyrinth, with huge volume, holes in caves, buildings in caves, and holes in buildings. The function distribution of the floors is obvious. The design and construction of the project won the collective award of the National Science and Technology Congress at that time.            In April 2002, the National Defense Science, Technology and Industry Commission approved the decryption of 816 underground nuclear project by the Secret Office of Science and Technology (2002) No. 14. In 2009, the project site was identified as a key cultural relic protection unit at the municipal level. In April 2010, the main part of Project 101 was opened to the outside world for the first time as a tourist product, attracting tourists from all over the country to visit July 1, 2015. In line with the principle of "protection and reproduction, utilization of innovation", 816 underground nuclear project scenic spots were upgraded and built, and the first phase of the project was opened to the outside world restrictively on September 18, 2016.