What are Vehicle Emission Standards?
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China's emission standards are categorized as: National I, National II, National III, National IV, National V, and National VI. As of December 31, 2018, the National 5 emission standard was implemented for light-duty gasoline vehicles nationwide. The National VI emission standard is implemented in two phases: 1. Phase One: Starting from July 1, 2020, all vehicles sold and registered must comply with the National VI A standard. 2. Phase Two: Starting from July 1, 2023, all vehicles sold and registered must comply with the National VI B standard; some cities may advance the implementation of the National VI emission standard for light-duty vehicles to January 1, 2019.