By Chuin-Wei Yap BEIJING–China imported 26.08 million metric tons of crude oil in May, equivalent to 6.37 million barrels a day, preliminary data from the General Administration of Customs showed Sunday. Imports were 8.9% higher than a year earlier, but down 6.4% from April. Refined oil product imports in May totaled 1.81 million tons, the data showed. China exported 2.22 million tons of oil products in May, according to the preliminary data. Write to Chuin-Wei Yap at [email protected]