(EnergyAsia, September 22) — China Petroleum and Chemical Corporation (Sinopec), China’s largest oil refiner, is planning to buy a 20% stake in Anbang Property & Casualty Insurance, an auto insurer.  China Daily reported that Sinopec will pay RMB338 million (US$1=RMB8.1) for the stake, making it one of Anbang’s largest stakeholders, along with carmaker Shanghai Automotive…