What emission standard does 'VI' represent?

[McEmiliano]

VI represents the China VI A (National VI A) standard, which is lower than the China VI B (National VI B) standard. Currently, the country divides the 'China VI standard' into two phases: 'China VI a' and 'China VI b', with plans to implement them nationwide uniformly in 2020 and 2023, respectively. The implementation of the China VI standard will impose stricter requirements on emissions such as carbon monoxide, nitrogen oxides, and hydrocarbons. Below is an introduction to the China VI emission standard: 1. The China VI emission standard is an upgraded version of the China V emission standard, with more stringent limits on emissions of CO (carbon monoxide), THC (total hydrocarbons), NMHC (non-methane hydrocarbons), NOX (nitrogen oxides), and PM (particulate matter) compared to the China V standard. 2. Compared to China V vehicles, China VI vehicles are equipped with additional components. In addition, automobile manufacturers face extra costs from various tests for vehicle declaration and approval, as well as production, leading to significantly higher prices for China VI vehicles compared to China V vehicles.