Three out of five classes.

According to the official website of Shandong Tianhong Chemical Co., Ltd., we learned that the gasoline and diesel produced by Shandong Tianhong Chemical Co., Ltd. all meet the National VI standards, and it has obtained the qualification for wholesale operation of refined oil and the qualification for the use of imported crude oil. The work mode adopts five shifts and three shifts. The method, taking five shifts and three shifts as an example, is to divide the on-duty personnel into five teams, with three teams working and two teams resting in a day, so as to prepare sufficient rest time for employees