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.
Hai'an County Hai'an County () is under the administration of Nantong, Jiangsu province, China, and is the northernmost division of Nantong City.