What does China 5 mean on a car?

[DeAustin]

China 5 refers to the National Fifth Stage Emission Standards for Motor Vehicle Pollutants. Here is some expanded information about motor vehicle pollutant emission standards: 1. China 5 is the automobile exhaust emission standard formulated by the environmental protection department, specifically the National Fifth Stage Emission Standards for Motor Vehicle Pollutants, also known as the China 5 standard. 2. The China 5 emission standard is an exhaust emission regulation set by environmental authorities, where a higher number indicates stricter standards and relatively lower pollution from exhaust emissions. 3. The emission control level of China 5 standard is equivalent to the Euro 5 emission standard currently implemented in Europe. Compared to the China 4 standard, the China 5 standard can reduce nitrogen oxide emissions by 25% for light-duty vehicles and 43% for heavy-duty vehicles.