Yinchuan Petroleum City is full of people from oil groups. According to relevant public information, Petroleum City is the common name of Changqing Oilfield located at Yangehu base in Yinchuan City. Located in Daxin Town, east of Yinchuan (the old city), it is the largest comprehensive oil base in northwest China. It is said that it covers an area of about 10000 mu, with more than 5,000 houses and a population of about 70,000 people, all of whom are members of the petroleum system or their families.