Introduction to Biyou Tiandi: "Bie You Cave" is inscribed in running script with a character diameter of 0.45 meters. The upper inscription reads: "Jidan of May in the Year of Qianlong" and the inscription is 0.12 meters in diameter. The lower inscription reads: "A letter from Zhao Zhibo, a believer in Shadi." ", the character diameter is 0.12 meters.