Songshan Mountain, also known as Nanyue, Shouyue and Nanshan, is one of the "Five Mountains" in China. It is located in the southeast of central Hunan Province, China, between Hengyang and Xiangtan Basin, and its main part is located in Nanyue District of Hengshan County and the east of Hengyang County. The name of Mount Hengshan, according to the Warring States Period "Shi Gan Jing", is named because it is located on the wing of the evening star in the constellation of 28 nights, and looks like a weighing instrument, which can be called heaven and earth.