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.