On December 12, the civil works of the Jinping Underground Laboratory Phase II Extremely Deep Underground Extremely Low Radiation Background Frontier Physics Experiment Facility (hereinafter referred to as "Jinping Facility") were completed and the experimental conditions were met. This marks the official opening of the world's deepest and largest extremely deep underground laboratory. The first batch of 7 experimental project teams from Tsinghua University, the Ministry of Ecology and Environment, Beijing Normal University, China Institute of Atomic Energy, Shanghai Jiaotong University, Sichuan University, University of Chinese Academy of Sciences, and the Fifth Institute of Electronics of the Ministry of Industry and Information Technology were stationed in the world's deepest and largest extremely deep underground experimental space.
Jinping Facility is the first infrastructure construction project of an extremely deep underground laboratory in China, and it is also the largest comprehensive experimental facility with a very low radiation background in the world. The laboratory is located 2400,<> meters underground in the middle of the Jinping Mountain Tunnel of Jinping Hydropower Station in Liangshan, Sichuan, with Jinping Mountain as the natural platform and the deep buried long tunnel of the hydropower station as the foundation. Compared with other underground laboratories in the world, the Jinping Underground Laboratory in China has the deepest rock coverage, the smallest cosmic ray flux, the lowest radiation background, the largest available space, and also has the advantages of convenient transportation, sufficient power and water sources, and complete infrastructure.
As a "national important instrument" in the field of particle physics and nuclear physics, Jinping Facility provides extremely low radiation background experimental conditions for cutting-edge physical science research such as dark matter, neutrinos, and nuclear astrophysics. As an open and shared large-scale scientific facility, the Jinping Facility also provides an excellent research platform for deep-earth sciences such as deep-earth rock mechanics and deep-earth medicine. In the future, the laboratory will become a multidisciplinary world-class deep earth science research center, which is of great significance for our country to explore the unknown world, discover the laws of nature, realize scientific and technological changes, and promote scientific and technological innovation.