China Petroleum and Chemical Corporation, or Sinopec Group, is a Chinese oil and gas enterprise based in Chaoyang District, Beijing. The SASAC administers China Petroleum and Chemical Corporation for the benefit of State Council of China. China Petroleum and Chemical Corporation operates a publicly traded subsidiary, called Sinopec, listed in Hong Kong and Shanghai stock exchanges. China Petroleum and Chemical Corporation is the world's largest oil refining conglomerate, state owned enterprise, and second highest revenue company in the world behind Walmart. Wikipedia