What is the difference between China 6a and 6b?

1 Answers
DelElizabeth
07/30/25 2:25am
The differences between China 6a and 6b: 1. Different carbon monoxide emissions: The emission standard for carbon monoxide in China 6a is 700 milligrams per kilometer; in China 6b, it is 500 milligrams per kilometer. 2. Different non-methane hydrocarbon emissions: The emission standard for non-methane hydrocarbons in China 6a is 68 milligrams per kilometer; in China 6b, it is 35 milligrams per kilometer. 3. Different nitrogen oxide emissions: The emission standard for nitrogen oxides in China 6a is 60 milligrams per kilometer; in China 6b, it is 35 milligrams per kilometer. China 6 refers to the National Sixth Stage Motor Vehicle Pollutant Emission Standard, which is divided into two phases: 'China 6a' and 'China 6b'.
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