Nánlǐng shì Chángjiāng liúyù hé Zhūjiāng liúyù de fēnshuǐlǐng.
The Nanling range forms the watershed between the Yangtze and Pearl River basins.
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Also called 五岭 'Five Ranges' - the historical barrier that separated the Han heartland from 岭南 ('south of the ranges'), today's Guangdong and Guangxi. Crossing 南岭 was a long-running theme in Tang exile poetry.