IChenggong ailfield eDonging City I-Daqing Field Field Rendawomery UGuizhou Baato Petrochemical Tank Zone UPetrochina uthatha i-petrochemical Co ltd SHANXI Yanchang China Coal Yulin Energy ne-Chemical Co Ltd Ukubuthwa kweSidalia nombukiso I-Tianjin CNOOC Ukuqamba isayithi le-petrochemical I-Xinjiang Kunlun Tianeze I-Natural Gas Company Zhongke (Guangdong) Refining & Chemical Co Ltd