1. Trucks with a total mass of less than 1.8t (including off-road vehicles) and mining operations have been scrapped for a total of 300,000km; the working life limits of diesel trucks are as follows: 1. Single-cylinder engine tricycles and low-speed trucks: the service life of diesel trucks is 9 years; 2. Tricycles, multi-cylinder engine low-speed trucks, and small trucks: the service life is 12 years; 3. Trucks transporting dangerous goods: the service life of scrapping is 10 years 4. Other trucks (including semi-trailer tractors and full-trailer tractors): the scrapping period is 15 years; 5. Special commercial vehicles with cargo-carrying function: the scrapping period is 15 years; 6. Those without cargo-carrying function Special-purpose commercial vehicles: 30 years of service life; 7. Full trailers and semi-trailers transporting dangerous goods: 10 years of scrapping service life; 8-container semi-trailers: 20 years of scrapping service life; 9. Other semi-trailers: 15 years of scrapping service life Year.