What are the differences between China National V and China National VI automotive emission standards?

[Elaine]

The differences between China National V and China National VI emission standards are as follows: Different emission standards: China National VI emission standards are more than 30% stricter than China National V. Excluding the influence of working conditions and tests, the carbon monoxide emissions of gasoline vehicles are reduced by 50%, the total hydrocarbon and non-methane hydrocarbon emissions are reduced by 50%, and nitrogen oxide emissions are reduced by 42%. Different implementation times: China National V standard was implemented nationwide on January 1, 2017, as the fifth phase of national motor vehicle emission standards. China National VI has been implemented since July 1, 2019. Different principles: During the China National V phase, the emission standards for diesel and gasoline vehicles were different, but China National VI adopts a fuel-neutral principle, meaning the emission limits are the same regardless of the fuel type. Different issuing departments: China National V standard was issued by the Ministry of Environmental Protection; China National VI standard was issued by the Ministry of Environmental Protection and the General Administration of Quality Supervision, Inspection and Quarantine. Different letter representations: China National V is represented by 'V'; China National VI is represented by 'VI'. Different monitoring requirements for plug-in hybrid electric vehicles: Compared to China National V, China National VI has improved monitoring requirements for plug-in hybrid electric vehicles, including energy storage systems, thermal management systems, brake regeneration, drive motors, generators, and other regulations. China National V standard limits are as follows: Gasoline vehicles must not emit more than 1,000 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 milligrams of PM fine particles per kilometer driven. China National VI has two standards: China National VIa and China National VIb. The details are as follows: China National VIa standard limits: Gasoline vehicles must not emit more than 700 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 68 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 60 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 4.5 milligrams of PM fine particles per kilometer driven. China National VIb standard limits: Gasoline vehicles must not emit more than 500 milligrams of carbon monoxide per kilometer driven. Gasoline vehicles must not emit more than 35 milligrams of non-methane hydrocarbons per kilometer driven. Gasoline vehicles must not emit more than 35 milligrams of nitrogen oxides per kilometer driven. Gasoline vehicles must not emit more than 3 milligrams of PM fine particles per kilometer driven. Affected by the China National VI emission policy, although China National V vehicles are not currently restricted in normal use, with no driving bans or license plate restrictions, their resale value will be significantly impacted. For car owners, if they purchase a truck for cargo transport with a loan, the vehicle's depreciation after repaying the loan is equivalent to the net profit earned during that period. A higher residual value means more profit for the owner. Therefore, from this perspective, China National VI vehicles, with longer service life and more road rights, have greater advantages.