Liuzhou is a prefecture-level city in north-central Guangxi Zhuang Autonomous Region, People's Republic of China. The prefecture's population was 3,758,700 in 2010, including 1,436,599 in the built-up area made of 4 urban districts. Its total area is 18,777km2 and 667km2 for built up area.GeographyLiuzhou is located on the banks of the winding Liu River, approximately 255km from Nanning, the regional capital. By road, it is about 167km to Guilin, 167km to Hechi, 237km to Nanning, 373km to Fangchenggang, 448km to Beihai.Swimming in the river is a tradition of the city. The river is normally green, but sometimes in summer, floods from the mountain areas upstream bring sediment which colors the water yellow. In early 2012, a cadmium spill upstream caused serious pollution worries.ClimateLiuzhou has a humid subtropical climate (Köppen Cfa), with mild winters and long hot summers, and very humid conditions year-round. The monthly 24-hour average temperature ranges from in January to in July, while extremes have ranged from -1.3to. Rain is both the heaviest and most frequent from May to August, when nearly two-thirds of the annual rainfall occurs.HistoryThe Liujiang men are among the earliest modern humans found in East Asia.Their remains were discovered in the Tongtianyang Cave (通天岩) in Liujiang County, Guangxi, China. Liujiang man is a Late Pleistocene Homo sapiens sapiens.