Chenggong Oilfield i gCathair Dongying Scaglann Réimse Ola Daqing Crios umar peitriceimiceach Guizhou Baota Petrochina Dongying Petrochemical Co. Ltd Shanxi Yanchang China Coal Yulin Energy and Chemical Co. Ltd Ltd Bailiú agus Taispeántas Sidalia Tianjin Cnooc Suíomh peitriceimiceach Weiming Cuideachta Gáis Nádúrtha Xinjiang Kunlun Tianze Zhongke (Guangdong) Refining & Chemical Co. Ltd Ltd