What does the pre-inspection of environmental protection in the annual inspection of automobiles mean?

Automobile exhaust emission testing (environmental inspection) should be carried out before other annual inspection items. The meaning of "pre-environmental detection in the annual inspection of automobiles" means that the automobile exhaust emission detection (environmental detection) is advanced to the forefront of the annual inspection of automobiles, that is, the exhaust emission detection is carried out before other annual inspection items are carried out. This is to strengthen the supervision of automobile exhaust emissions, improve the compliance rate of automobile exhaust emissions and reduce air pollution. In the case of pre-environmental inspection in the annual inspection of automobiles, the vehicle owner needs to conduct exhaust emission inspection first. If the test is unqualified, it needs to be repaired and adjusted before re-testing until the test is qualified. Only after the exhaust emission test is qualified can other annual inspection items be tested.