Da Cao Tan Township is located in the southwest end of Zhangxian County and Minxian border, 40 kilometers from Zhangxian County, G212 line running through the township of 7 administrative villages, the township has 8 villages, 41 societies, 2,373 households, 11,326 people, the average per capita net income of 1,359 yuan in 2006 covers an area of 355,000 acres of land, the total cultivated land area of 29,400 acres, elevation of 2,300 meters, an average annual temperature of 5.3 degrees, the frost-free season The average annual temperature is 5.3 degrees Celsius, and the frost-free period is about 80 days. The annual rainfall is about 500-800mm. With high mountains and deep valleys, the main geomorphological features of the mountain plateau is slow, belonging to the south of the middle mountain plateau valley agriculture, forestry and animal husbandry area, the whole township altitude of 2300-2762 meters, the annual cumulative temperature of 1549 ℃, the highest temperature for the 〈July〉 15.2 ℃, the lowest temperature for the (New Year's month) for -8.8 ℃, the number of hours of sunshine 2312 hours per year, the minimum of 5.6 hours (February), the maximum 7.7 hours (July), soil is mainly black fertile soil, the soil is mainly black fertile soil, the soil is mainly black fertile soil, the soil is mainly black fertile soil, the soil is mainly black fertile soil, the soil is mainly black fertile soil. The soil is mainly black fertile soil, brown soil and yellow clay soil, and the main crops are broad beans, wheat, taro, angelica, rape and so on. The township land area of 176,241.1 acres, of which: 49,300 acres of arable land, accounting for 28% of the total land area, per capita arable land of 3.85 acres, 21,143 acres of fallow forests, there are 12 administrative villages, 47 villagers groups, 2,529 households, 12,196 people, per capita net income of 1,462 yuan in the last year, the value of agricultural value-added of more than 17,960,000 yuan, the total grain production of 734,140 kilograms, per capita grain production of 576 kilograms. Per capita grain production of 576 kilograms. Dacaotan Township is building the Lan Yu Railway in its territory with Zhangxian Railway Station, the proposed Lanhai Expressway has an exit, convenient transportation, location advantages are obvious. Rich in tourism resources, the jurisdiction of the national AAAA level tourist attractions - Chayang Mountain, scenic areas within the Chayang Valley, alpine meadows, primeval forests, is an ideal summer resort and natural oxygen bar. The climate is humid, the rainfall is abundant, the vegetation is good, and it is the birthplace of Zhanghe River. The leading industries to "Chinese herbs, animal husbandry, labor, tourism" is the main. In recent years, the entire township cadres and masses in the township party committee, under the leadership of the government, is actively building the Lanzhou-Chongqing Railway, Lanhai high-speed and 212 national highway line combination of "characteristics of the strong economic township.