What does China V and China VI mean for vehicles?

[OMolly]

China V and China VI refer to the vehicle emission standards, which regulate the content of harmful gases such as carbon monoxide, PM, and soot emitted from vehicle exhaust. The transition from China V to China VI includes improvements in intake and exhaust efficiency, exhaust gas recirculation efficiency, etc., with the aim of reducing the levels of harmful gases. Simply put, the China VI emission standard is an upgraded version of the current China V standard, imposing stricter limits on the emission of CO (carbon monoxide), THC (total hydrocarbons), NMHC (non-methane hydrocarbons), NOX (nitrogen oxides), and PM (particulate matter) compared to the China V standard. Additionally, it introduces new regulations on PN (particulate number) emissions.