What is the Chinese equivalent of Euro 4 standard?

[Rivera]

The Euro 4 standard is equivalent to China's National Standard 4 (Guo 4). China's vehicle emission standards differ from European standards. The Chinese standards are national regulations tailored to China's specific conditions, while the European standards are common regulations adopted by European Union member states. For vehicles that meet environmental protection standards, the government issues emission classification labels in yellow and green colors. These labels are used for energy conservation, emission reduction inspections, and regular environmental protection checks on vehicles. China's vehicle emission standards include National Standard 1 (Guo 1), Guo 2, Guo 3, Guo 4, Guo 5, and Guo 6. Compared to the current Guo 5 standard, the Guo 6 standard has increased emission requirements by 40% to 50%.