According to Baidu Encyclopedia, Nanshan County belongs to Yongzhou City, Hunan Province, and is located on the north side of the middle section of Nanling Mountain in the south of Hunan Province. It is an important gateway from Nantong, western Hunan to the coastal area of Guangdong.
By 2022, the total registered population of Lanshan County will be 410.30 million, and the permanent population will be 324,600. By 2022 10, Lanshan County will have jurisdiction over 8 towns and 6 townships.