yuzhongxianIntroduction：Introduction to Langzhong: Yuzhong County is in the central part of Gansu Province, connected to Qilihe and Chengguan District in the west, Anding District in Dingxi City in the east, Linyi County in the southwest, and the Yellow River in the north and the Pingchuan District in Baiyin City. Yuan County and Huining County meet. The terrain of Suizhong County is high in the south and low in the north, with a concave shape in the middle and a saddle shape. The southern part is a rocky alpine mountainous area, and the highest peak of Mahan Mountain is 3670.3 meters above sea level. The northern part is the loess hilly area, and the highest peak Lujiatun is 2495 meters above sea level. Between the two mountains in the north and the south is the hilly and gully area of ​​Sichuan and Chongqing, with an altitude of 1500-2000 meters. The terrain is inclined from the southwest, southeast and northeast to the northwest. It belongs to a temperate semi-arid climate with an average annual temperature of 6.7 ° C, a precipitation of 400 mm and a frost-free period of 120 days. Yuzhong County has 1,054,400 mu of cultivated land, accounting for 33.4% of the city's total cultivated land. Among them, effective irrigation is 291,400 mu. The total annual runoff of surface water is 53.49 million cubic meters, and the total groundwater reserves are about 940 million cubic meters. There are 7 townships of Gongjing, Haqian, Yuanzi, Shanghuayu, Zhonglianchuan, Weiying and Longquan, with more than 59,000 people, more than 350,000 mu of cultivated land and 5.9 mu per capita. The main crops are spring wheat, peas, artichokes, corn and flax. It is the main grain and economic crop planting area and industrial production base in Yuzhong County.