Claim: Jianxi, established in July 1955 in Luoyang Prefecture, Henan, China, has a total population of 513,000 in 2015, and has a total area of 90 km (30 sq mi).
Evidence: Jianxi District established in July 1955, locate the west of Jian River and Xigong District is east by the Jian River. Luoyang Henan People's Republic of China 513,000 90 km (30 sq mi)