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China Jin-Ping underground Laboratory

Located in the middle of a 18-km tunnel under 2400 meters of rock overburden, in the Sichuan province of south-west China. As one of the deepest underground labs in the world, the CJPL has an extremely low flux of muon rate of less than $20/m^{2}/100$ day, which is about two orders of magnitude lower than the flux at the Gran Sasso underground laboratory (LNGS) in Italy. The low muon rate and the resulting background makes the lab ideal for a sensitive dark matter detection.

Jinping tunnel