What is the difference between China 6A, China 6B, and China 6?

[McKingston]

The differences between China 6A and China 6B are as follows: 1. China 6A and China 6B have different requirements for the content of carbon monoxide, non-methane hydrocarbons, nitrogen oxides, and PM fine particles in exhaust emissions. Compared to China 6A, China 6B imposes stricter emission requirements for carbon monoxide, non-methane hydrocarbons, nitrogen oxides, and PM fine particles, with significantly tighter limits. China 6A can be considered a transitional phase to China 6B. 2. Currently, the Chinese government has divided the "China 6 Standard" into two phases: "China 6A" and "China 6B," with nationwide implementation planned for 2020 and 2023, respectively. The China 6 Standard, officially known as the "National Sixth Stage Emission Standard for Motor Vehicles," was established to enforce environmental protection laws, reduce and prevent pollution from vehicle exhaust emissions, protect the ecological environment, and safeguard human health.