1. The fifth phase of the national motor vehicle pollutant emission standard, referred to as the "National Five Standard" for short, is equivalent to the fifth phase of the emission standard being implemented in Europe.
 2. Since 2009, the EU has implemented stricter restrictions on motor vehicle emissions such as nitrogen oxides, hydrocarbons, carbon monoxide and suspended particles.
 3. The single vehicle pollution will be reduced by 30% to 50% every time the standard is raised from country I to country IV.
 4. The fifth phase of national motor vehicle emission standards has been implemented nationwide since January 1, 2017.
 5. Beijing, Shanghai, Nanjing and other cities as well as some cities in Guangdong have begun to implement the national five standards.
 6. From April 1, 2016, all imported, sold and registered light gasoline vehicles, light diesel buses and heavy diesel vehicles (only for public transport, sanitation and postal purposes) in Beijing, Tianjin and Hebei must meet the "National V" standard for motor vehicle emissions.
 The basic details of the National Five Year Standard in this article have been explained, and I hope it will be helpful to everyone.