China’s imports of oil from Russia and Iran are set to drop this month as importers and refiners are more careful and still devise workarounds after the U.S. stepped up sanctions on Russia’s oil exporters and on China’s terminals that are key import hubs for sanctioned Iranian crude. Imports from Russia could drop by up to 800,000 barrels per day (bpd) in November compared to the levels before the U.S. sanctions on Rosneft and Lukoil, according to estimates by Rystad Energy cited by Bloomberg. Due to a separate set of U.S.…