(EnergyAsia, February 26) — PetroChina, a unit of China National Petroleum Corp (CNPC), has received approval from the National Development and Reform Commission (NDRC), to build a 10-million-ton/year oil refinery in Qinzhou city in Guangxi province.   The 15.2-billion-yuan refinery, the largest in southwestern China, is expected to come on stream next year and could…