What do China V and China VI mean for vehicles?

[CeciliaDella]

China V and China VI refer to vehicle emission standards, which regulate the content of harmful gases such as carbon monoxide, PM, and soot emitted from vehicle exhaust. The higher the number, the later the standard was issued, and the stricter the requirements for energy conservation and emission reduction. The transition from China V to China VI involves improvements in intake and exhaust efficiency, exhaust gas recirculation efficiency, etc., with the aim of reducing the levels of harmful gases. The China VI emission standard is an upgraded version of the current China V standard, imposing more stringent limits on the emission of carbon monoxide, total hydrocarbons, non-methane hydrocarbons, nitrogen oxides, and particulate matter mass compared to the China V standard. Additionally, it introduces new regulations on the number of particulate matter emissions.