What is the Chinese equivalent of Euro IV?

[Corinne]

Euro IV emission standard is equivalent to China's National IV emission standard. Emission standards: National 3 and National 4 standards are based on Euro 3 and Euro 4 vehicle emission standards. Compared with National 2, National 3 further reduces the limits of pollutant emissions. The exhaust pollutant emission limits of China's Phase 3 standard are 30% lower than those of Phase 2 standard, while China's Phase 4 standard will further reduce them by 60%. Euro IV: The Euro IV standard refers to the Euro IV emission standard, which was implemented at the end of 2005 and is an important standard for vehicle exhaust emissions, currently implemented in most countries. This standard requires that diesel cars emit no more than 250 milligrams of nitrogen oxides per kilometer; vans and SUVs emit no more than 390 milligrams of nitrogen oxides per kilometer.