What is the difference between China VI-B and China VI?

[AnastasiaFitz]

The differences between China VI-B and China VI are: 1. Difference one: The implementation times of China VI-B and China VI are different. China VI-A was mandatorily enforced for light-duty vehicles starting from July 1, 2020, while China VI-B will be mandatorily enforced from July 1, 2023. 2. Difference two: China VI-A is a transitional phase from China V to China VI, whereas China VI-B, coming three years after China VI-A, is the formal phase. 3. Difference three: China VI-B is 29% stricter than China VI-A in terms of carbon monoxide emission limits, and 50% stricter in hydrocarbon emissions. Additional information: All the limits of China VI-B represent a new step up from those of China VI-A.