April 28th. According to relevant public information, experts analyzed the current formation mechanism of refined oil prices. On April 28th, domestic oil prices will be lowered by 50 yuan per ton, and diesel and gasoline prices will be lowered by 0.05 yuan per liter. Oil price refers to the international or domestic price of refined oil, and refers to gasoline, kerosene, diesel and other alternative fuels that meet the national product quality standards and have the same use, such as ethanol gasoline and biodiesel.