A customer's car drives into PetroChina's petrol station in Beijing
A customer's car drives into PetroChina's petrol station in Beijing, China, March 21, 2016. PetroChina, China's biggest oil and gas producer, reported a 70 percent slumpin its full-year 2015 profit, with earnings upstream and in the marketing segment both taking a hit from lower prices. Picture taken March 21, 2016. REUTERS/Kim Kyung-Hoon