According to Chinese customs data on Monday, Russian oil imports increased 55 per cent year-on-year in May, to about 8.4 million tonnes. That was also a month-on-month increase: China imported 6.6 million tons of oil in April from Russia. That put Russia in place as China’s top oil provider for the first time in a year and a half. Saudi Arabia only exported 7.8 million tons to China in May. The shift to China comes weeks after the EU agreed to limit Russian oil imports and amid a fight about Russian gas deliveries. European officials say that Russia is cutting...