How to Identify China 4 and China 5 Standards?

[PenelopeMarie]

China 4 emission standard is marked as IV, while China 5 emission standard is marked as V. The China 4 emission standard is the fourth stage of national motor vehicle pollutant emission standards, and the China 5 standard is equivalent to the EU's Euro 5 standard. Each upgrade in the standard reduces vehicle pollution by 30% to 50%. The following are the differences between China 4 and China 5 standards: 1. Under the new China 5 standard, nitrogen oxide emissions from light-duty vehicles can be reduced by 25%, and from heavy-duty vehicles by 43%. 2. Compared to China 4, the biggest difference in China 5 is stricter emission requirements for heavy-duty vehicles, followed by higher standards for nitrogen oxides (NOX), the sum of hydrocarbons and nitrogen oxides (HCNOX), and particulate matter (PM) concentration. 3. China 5 introduces standards for particulate matter particle count (PN) and non-methane hydrocarbons (NMHC).