BEIJING, Feb. 15 (Xinhuanet) -- China Petroleum & Chemical Corp. (Sinopec), China's largest oil refinery, announced on Wednesday that it will buy back its four listed subsidiaries at a cash offerof 14.3 billion yuan (1.78 billion U.S. dollars).

    The four companies are Sinopec Qilu Petrochemical Co., Sinopec Yangzi Petrochemical Co., Sinopec Zhongyuan Petroleum Co., and Sinopec Shengli Oil Field Dynamic Group Co., respectively. Enditem