The Nanling, also known as the Wuling, is a major mountain range in Southern China that separates the Pearl River Basin from the Yangtze Valley and serves as the dividing line between south and central subtropical zones. The main range of Nanling Mountains stretch west to east about 600 kilometers (370 mi) from Guilin and Hezhou of the eastern Guangxi to Ganzhou of the southern Jiangxi, north to south about 200 kilometres (120 mi) from Yongzhou and Chenzhou of the southern Hunan to Qingyuan and Shaoguan of the northern Guangdong; With their branches, the mountains run west to east 1,400 kilometers (870 mi).