BEIJING (AFX-ASIA) – Three major Chinese oil companies are expected to invest more than 10 billion yuan in the next six years in China’s western Xinjiang province, the official Xinhua news agency reported. (US$1=8.27 yuan). China National Petroleum Corp (CNPC), China Petrochemical Corp (Sinopec Group) and China Sinochem Corp are aiming to turn the Xinjiang…