In which year was the China 6 emission standard implemented?
2 Answers
The China 6 emission standard includes two emission limit schemes, China 6a and China 6b, which were implemented in 2020 and 2023 respectively. Here is a detailed introduction about the China 6 standard: Relevant data regulations: China 6A specifies specific standards such as carbon monoxide 700mg/km, non-methane hydrocarbons 68mg/km, nitrogen oxides 60mg/km, etc. China 6B specifies specific standards such as carbon monoxide 500mg/km, non-methane hydrocarbons 35mg/km, nitrogen oxides 35mg/km, PM fine particles 3mg/km, etc. Other aspects: After the implementation of the China 6 standard, it only affects the registration of new China 5 vehicles. Already registered and annually inspected China 5 vehicles will not be affected in normal use.
I remember the China 6 implementation was phased in for light-duty vehicles. Back in 2019, many cities like Shenzhen directly skipped to China 6b, while the nationwide mandatory China 6a standard came into effect in July 2020. However, heavy-duty diesel vehicles like trucks had a grace period - natural gas vehicles started in July 2019, while diesel trucks were delayed by a year. Special mention goes to high environmental pressure regions like Beijing and Shanghai, which always move faster. Just this year when helping a friend check used cars, I realized you must verify the local emission requirements at the time of purchase when buying cross-regionally - don't just look at the manufacturing year.
