Are all the people in Yinchuan Oil City people from the oil group?

The people in Yinchuan Oil City are all people from the oil group. According to relevant public information, Oil City is the local name for the Yange Lake base of Changqing Oilfield in Yinchuan. It is located in Daxin Town, east of Yinchuan City (Old City). It is the largest comprehensive oil base in the northwest region. It is said that it covers an area of ??more than 10,000 acres, has more than 5,000 housing units, and a population of about 70,000. They are all part of the petroleum system. person or family.