Introduction to Langzhong: Yuzhong District is the central city of Chongqing. It is located at the intersection of the Yangtze River and the Jialing River. It is surrounded by the two rivers and resembles a peninsula. It is the famous “mountain city” and “Jiangcheng” for the economic, cultural and commercial circulation center of Chongqing. It is also the culture of Bayu. , the culture of the war of resistance and the birthplace of the spirit of Hongyan. As of the end of 2010, Yuzhong District had a permanent residence of 639,000. By the end of 2013, the water and land area of ​​Yuzhong District was 23.71 square kilometers, of which land was 18.54 square kilometers. It contains 12 streets and 76 community neighborhood committees. Yuzhong District is a national civilized city and has won the honorary titles of “China Love City”, “City-level Environmental Protection Model Area”, “National Chronic Disease Comprehensive Prevention and Control Demonstration Zone” and “National Science Popularization Demonstration Zone”.