Qingyuan, formerly romanized as Tsingyun,[a] is a prefecture-level city in northern Guangdong, China, on the banks of the Bei or North River. During the 2010 census, its total population was 3,698,412, out of whom 1,510,044 lived in the urbanized Qingcheng and Qingxin districtss. The primary spoken language is Cantonese. Covering 19,015 km2 (7,342 sq mi), Qingyuan is Guangdong's largest prefecture by land area. The urban core is surrounded by mountainous areas but is directly connected with Guangzhou and the Pearl River Delta by Highway 107.
Qingyuan's administrative area ranges in latitude from 23° 31' to 25° 12' N, and in longitude from 111° 55' to 113° 55′ E, just north of the Tropic of Cancer and about 200 km (120 mi) from coast of the South China Sea. More than half of the area is mountainous, and elevations increase from southeast to northwest.
Qingyuan has a monsoon-influenced humid subtropical climate, with an average annual temperature of 20.7 °C (69.3 °F), 1,900 mm (75 in) of rainfall, 1662.2 hours of sunshine, and a frost-free period of 314.4 days.