What Emission Standard Does National V Represent?
3 Answers
"National V" represents the fifth category of emission standards. The symbol "V" is a Roman numeral, which is the earliest form of numerical representation, originating in Rome over 2000 years before Arabic numerals. For example, Roman numerals: Ⅰ, Ⅱ, Ⅲ, Ⅳ, Ⅴ correspond to Arabic numerals 1, 2, 3, 4, 5 respectively. Below is additional information on National V: 1. The National V standard is equivalent to the Euro 5 standard in the European Union, which has been implemented since 2009. It imposes stricter limits on vehicle emissions such as nitrogen oxides, hydrocarbons, carbon monoxide, and particulate matter. Each upgrade from National I to National IV reduces vehicle pollution by 30% to 50%. After review by relevant authorities, the National V standard was implemented nationwide starting from January 1, 2017. 2. The use of new standard gasoline and diesel will reduce multiple pollutants, cutting PM2.5 emissions from National IV to National V. Environmental indicators have been further tightened, with sulfur content reduced from 50ppm to 10ppm, and fuel quality significantly improved. The draft also revised gasoline grades from 90, 93, 97 to 89, 92, 95.
Regarding the National V emission standard you mentioned, I think it refers to China's fifth-stage emission standard, commonly known as 'Guo Wu' (National Five). I remember it was implemented starting in 2017, significantly tightening restrictions on vehicle exhaust pollutants. For example, it required lower emissions of carbon monoxide and particulate matter, compelling manufacturers to improve engine technology and add catalytic converters. As an ordinary car owner, I paid special attention to this when purchasing a car because vehicles meeting the National Five standard can still be driven in restricted zones of some major cities, though the newer National Six standard is even stricter. If you're considering a used car, checking the environmental label will tell you which standard it meets. National Five vehicles are still relatively common in the used car market and don’t directly affect daily driving, but they are more environmentally friendly, helping to avoid pollution fines. The current trend is upgrading to National Six, and future vehicles will be even cleaner and greener. Simply put, these are progressive new requirements introduced by the government to improve air quality.
When talking about China V emissions, it refers to the China 5 emission standard, which is the fifth stage. I often encounter car owners asking about this during repairs, as they worry their vehicles might fail annual inspections or face registration issues. Implemented in 2017, China 5 significantly tightened emission limits, imposing stricter controls on nitrogen oxides and hydrocarbons, marking a major improvement over the China 4 era. Vehicles must be equipped with better exhaust systems to comply. For car owners, the main impact lies in regional policies—such as certain cities restricting high-emission vehicles from entering. Before purchasing a car, it's advisable to check the manual or conduct an online query to confirm the vehicle's standard and avoid urban access issues. Emission upgrades also facilitate the circulation of used cars, with many China 5 vehicles currently on the market. However, the new China 6 standard is already rolling out, and supporting environmental policies is worthwhile in the long run.
