Introduction to Jinniu: Jinniu District is one of the downtown areas of Chengdu, the hometown of Jiaozi, the commercial highland, and the modern Taurus. Jinniu District is located in the northwest of the upper reaches of the water, 108 square kilometers, with a population of more than 1.2 million, which is an advanced demonstration zone for national sustainable development. It is also the central city with the most population, the most prosperous trade and the most active economy in the main urban area of ​​Chengdu. For the 19th consecutive year, it ranks first in all districts (cities) of Chengdu. Along with the reform and opening up, it has formed a well-known lotus pond integrated market in the country, the first city in western China, and the largest hardware and electrical trading base in the west.