News from the conference of "2004 automotive national-level emmission of international cooperation network of testing laboratory" which held in Beijing a few days ago, Chinese government had alreasy successively released and revised 34 emmission standard of motor vehicles, have formed comparatively emmission standard system, including automobile, engine and motorcycle, reached the second control stage of European motor vehicle.

With the constant growth of the motor vehicle, the total pollutant emission of national motor vehicle increases continuously. In 2003, the emmission of hydrocarbon, carbon monoxide and nitrogen oxide of the whole national motor up to 836100 tons, 363980 tons and 549200 tons respectively. the impact on environmental air quality more serious . For this reason, from 1983, the national related departments began to control the emmission of the motor vehicles.

In 2000, the whole country succeed in realizing the motor petrol unleade, at present, Chinese government is advancing and cleaning the motor fuel actively.