Claim: Chengbu, lying in the upper reaches of the Wu River, covers 1,022 square miles in Shaoyang, Hunan in the People's Republic of China and as of 2017, has a population of 292,033.
Evidence: It lies in the upper reaches of the Wu River. The county has a total area of 2,647.07 square kilometres (1,022.04 sq mi). Chengbu Miao Autonomous County (simplified Chinese: 城步苗族自治县; traditional Chinese: 城步苗族自治縣; pinyin: Chéngbù Miáozú Zìzhìxiàn; usually referred to as "Chengbu County", commonly abbreviated as "Chengbu", simplified Chinese: 城步县; traditional Chinese: 城步縣; pinyin: Chéngbù Xiàn) is an autonomous county of Miao people in the Province of Hunan, China, it is under the administration of Shaoyang City. 292,033