What is the difference between Audi's China 5 and China 6 standards?

[Gwendolyn]

The biggest difference between Audi's China 5 and China 6 standards lies in the vehicle exhaust emissions. Under the China 5 standard, the carbon monoxide limit is 1000mg/km, while the China 6a standard requires 700mg/km, and the China 6b standard reduces it by half to just 500mg/km. Other limits, such as nitrogen oxides and particulate matter, have also significantly decreased. Specific details are as follows: 1. Difference in catalytic converters: The China 6 emission standard reduces particulate matter by 67% and nitrogen oxides by 77% compared to China 5, which can be simply understood as 'the difference of one catalytic converter.' 2. China 6a and China 6b: The China 6 standard is known as the strictest emission standard to date, implemented in phases with two emission limit schemes, China 6a and China 6b, which were rolled out in 2020 and 2023, respectively. Additionally, key regions with special requirements for atmospheric environmental management could implement the China 6 emission limits ahead of schedule.