How to Identify the Letter for China 6 Vehicle Emission Standards?

1 Answers
OMackenzie
07/29/25 9:03pm
In China's vehicle emission standards from China 1 to China 5, the corresponding characters are I, II, III, IV, and V respectively, while China 6 is represented as Ⅵ. The implementation of the China 6 emission standard will be divided into two phases: "China 6a" and "China 6b", with corresponding time points on July 1, 2020, and July 1, 2023. In fact, China 6a is only a transitional stage from China 5 to China 6, and by 2023, the China 6 emission standard will be fully implemented. Below are the requirements for the China 6 emission standard: 1. The China 6 standard: The China 6 standard is extremely high and is considered one of the strictest vehicle emission standards globally. Compared to the China 5 emission regulations, China 6 adds limits for nitrous oxide and particulate matter particle counts, and requires a 50% reduction in carbon monoxide content during cold start conditions, a 30% reduction in hydrocarbon content, and a 30% reduction in carbon monoxide content. 2. China 5 vehicles can still be driven after the implementation of China 6 standards: Even after the implementation of the China 6 standard, China 5 vehicles can still be driven on the road, although registration and licensing may become more difficult. For those China 5 vehicles in stock, they will definitely be sold at discounted prices, and the closer the date of China 6 implementation gets, the cheaper they will become.
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