Sazhong oilfield. Baidu map shows that the ninth operation area of Daqing No.1 Oil Production Plant is located in Sazhong Oilfield in Daqing Changyuan, which was built in 1960, and the development area of Sazhong Oilfield under its jurisdiction is 16 1.25 square kilometers. Management 1 1656 oil and water wells, 1 189 joint station.