Yes Tongnan generally refers to Tongnan District. Tongnan District, belonging to Chongqing, is located in the northwest of Chongqing. It is an emerging industrial base in Chengdu and Chongqing, an eco-cultural tourism destination in western Chongqing and a green vegetable capital in western China. Tongnan will surpass Tongliang in development. Copper beam generally refers to the area of copper beam. Tongliang District is located in the upper reaches of the Yangtze River, western Chongqing, Chongqing metropolitan area and the new urban development zone. It is the hometown of Qiu, a martyr in Chinese people's Volunteer Army, and the birthplace of Tongliang Dragon Lantern.