• cnpc – sichuan petroleum administration bureau • petrochina company limited – southwest gas field subsidiary • petrochina company limited – tarim oil field subsidiary • petrochina company limited – changqing oil field subsidiary • cnpc–daqing petroleum administration bureau • petrochina company limited – daqing oil field co.,ltd. • cnpc–liaohe petroleum administration bureau • petrochina company limited – liaohe oil field subsidiary • cnpc– cnodc • cnpc– cpecc • cnpc– cpe • cnpc– tibet sales subsidiary • cnpc– dalian international storage & transpotation co., ltd. | • sinopec corp. – sinopec shengli oil field co. ltd. • sinopec – shengli oil field co., ltd. • sinpec – shengli engineering design & consultation co., ltd. • sinopec – northwest subsidiary • sinopec – zhongyuan subsidiary • sinopec corp. –sinopec beijing yanshan petrochemical co., ltd. • cnpc- petrochina jinxi petrochemical co., ltd. • cnodc • sinochem corporation – sinochem shandong fertilizer co., ltd. • sinochem corporation – tianji sinochem gaoping chemical engineering co., ltd. • lanqiao petrochemical co. ltd. of rizhao, shandong province |