Daqing Oilfield Co., Ltd.
0459-5994050
Longnan, Ranghu Road, Daqing City, Heilongjian Province

Liaohe Oilfield Company
0427-7298001
98 Petroleum Street, Xinglongtai District, Panjin City, Liaoning Province

Xinjiang Oilfield Company
0990-6881419
66 Yingbin Road, Karamyi City, Xinjiang

Changqing Oilfield Company
029-86596666
151 Weiyang Road, Xi'an City, Shaanxi Province

Southwest Oil & Gas Field Company
028-86011689
5, Section One, Fuqing Road, Chengdu City, Sichuan Province

Tarim Oilfield Company
0996-2171208
P.O. Box 78, Korle City, Xinjiang

Huabei Oilfield Company
0317-2724876
Renqiu City, Hebei Province

Dagang Oilfield Company
022-25923209
Dagang District, Tianjin

Jilin Oilfield Company
0438-6258028
1219 Yanjiangdong Road, Songyuan City, Jilin Province

Turpan-Hami Oilfield Company
0995-8371437
Railway Station Town, Shanshan, Xinjiang

Qinghai Oilfield Company
0937-8926811
Qili Town, Dunhuang City, Gansu Province

Jidong Oilfield Company
0315-8766065
Jiaqu, 51 Guangmingxili, Tangshan City, Hebei Province

Yumen Oilfield Company
0937-3921346
Zhongping District, Yumen City, Gansu Province

Zhejiang Oilfield Company
0571-85125289
374 Tianmushan Road, Hangzhou City, Zhejiang Province