As of the end of June this year, my country's motor vehicle ownership reached 440 million, of which the number of large trucks exceeded 30 million, diesel trucks accounted for the vast majority, and the number of national three heavy trucks still stood at 497,000. As the battle against pollution continues to deepen, the proportion of motor vehicle pollution has become increasingly prominent in some areas. In some areas, the contribution rate of motor vehicle pollution emissions to PM2.5 even rea