Russia now China's largest crude supplier

Russia became China's biggest crude supplier in May, overtaking Saudi Arabia, as the global competition for oil intensified.

China imported a record 3.92 million metric tons of Russian crude during the month, or 927,000 barrels a day, according to data from the General Administration of Customs on Tuesday, a 20 percent increase on April.

Saudi Arabia has slipped to China's third-largest crude supplier, after Russia and Angola.