Which country contains County-level cities by the names of Wu'an and Langzhong?
Langzhong Langzhong is a county-level city in northeastern Sichuan, China, located on the middle reaches of the Jialing River. It is administered as part of the prefecture-level city of Nanchong. Langzhong has a total population of 840,000, with 200,000 residing in the urban area.
Wuhu Wuhu (; literally "Weedy Lake") is a prefecture-level city in southeastern Anhui province, China. Sitting on the southeast bank of the Yangtze River, Wuhu borders Xuancheng to the southeast, Chizhou and Tongling to the southwest, Hefei Province to the northwest, Ma'anshan city to the northeast, Jiangsu Province to the east, and is approximately 90 km southwest of Nanjing. As of 2014, the city had a population of approximately 3,617,000 officially registered inhabitants.