To manage air pollution, Beijing has introduced The Gasoline Standard for Beijing Motor Vehicles and The Diesel Oil Standard for Beijing Motor Vehicles. These two standards will come into effect on October 1, enabling the implementation of "Euro 3 Emission" standards by July 1, 2005.

The introduction of the two standards is in recognition of the fact that motor vehicle emissions are not merely related to emission management technologies, but also to the quality of gasoline standards. With motor vehicles pursuant to "Euro 3 Emission" standards, emission rates will be greatly reduced. It is estimated that a Euro 3 emission-compliant car's emissions will be 40% lower than that cars meeting "Euro 2 emission" standards.