Chinese oil exports to North Korea in May did not include any commonly-used fuels, Beijing’s most recent trade figures show, following a small shipment of gasoline the previous month.

Although Beijing reports small exports of refined petroleum products to North Korea each month to the ITC Trade Map, a more detailed look at the numbers reveals a longstanding cut off in usable fuels like gasoline and diesel.

Since mid-2017, Chinese petroleum exports to North Korea have typically lacked gasoline, diesel, and heavier fuel oils typically used in vessels and industry, and another category of