What are the symbols for China's emission standards?

[SebastianAnn]

China's vehicle emission standards are denoted as China I, China II, China III, China IV, China V, and China VI. The purpose of these emission standards is to implement environmental protection laws, reduce and prevent vehicle exhaust pollution, protect the ecological environment, and ensure human health. The following is a detailed introduction to China's vehicle emission standards: China I Emission Standard: In the early 1980s, China issued a series of motor vehicle exhaust pollution control emission standards, including "Idle Emission Standards for Gasoline Vehicles," "Free Acceleration Smoke Emission Standards for Diesel Vehicles," "Full Load Smoke Emission Standards for Automotive Diesel Engines," and their measurement standards. This marked the gradual establishment of China's vehicle emission standards. It was not until July 1, 2001, that the China I standard was fully implemented nationwide. China II Emission Standard: During this phase, China had developed a relatively complete vehicle exhaust emission standard and testing system. Beijing took the lead in implementing the China II emission standard. The requirements for various pollutant emissions were further tightened, and the standard was implemented nationwide by July 1, 2004. China III Emission Standard: On December 30, 2005, Beijing began implementing the China III emission standard. It was during this time that OBD devices started to be widely used. The specific implementation dates were: July 1, 2009, for light-duty diesel vehicles; July 1, 2010, for heavy-duty gasoline vehicles; July 1, 2008, for heavy-duty gas vehicles; and July 1, 2008, for heavy-duty diesel vehicles. China IV Emission Standard: On January 1, 2008, China IV fuel was introduced in Beijing, followed by other cities like Shanghai and Guangzhou adopting the standard. The nationwide implementation dates were: July 1, 2013, for light-duty diesel vehicles; July 1, 2013, for heavy-duty gasoline vehicles; January 1, 2011, for heavy-duty gas vehicles; and July 1, 2013, for heavy-duty diesel vehicles. China V Emission Standard: The China V emission standard was fully implemented nationwide on July 1, 2017. Compared to China IV, it reduced nitrogen oxide emissions by 25% and introduced stricter PM (particulate matter) emission limits. China VI Emission Standard: The "China VI" standard is an upgrade of the China V standard. Compared to "China V," "China VI" imposes stricter limits on pollutant emissions, making it one of the most stringent standards globally. Specifically, "China VI" reduces carbon monoxide emissions from gasoline vehicles by 50%, total hydrocarbons and non-methane hydrocarbon emissions by 50%, and tightens nitrogen oxide emission limits by 42%.

[McAyla]

I've been researching automotive emission standards recently. The Chinese national emission standards are denoted as 'Guo X', where X is represented by Roman numerals. For example, Guo I stands for the first level, Guo II for the second level, up to the current Guo VI. This symbol is quite important, reflecting the environmental protection level of vehicles from the implementation of Guo I in 1999 to Guo VI in 2019. When buying a car, it's essential to pay attention to this symbol. For instance, cities like Beijing, Shanghai, Guangzhou, and Shenzhen now have traffic restrictions for vehicles below Guo V. Choosing a higher standard like Guo VI can save fuel and enjoy policy benefits. I also noticed that this symbol is similar to the European Euro standards, with some localized adjustments in the Chinese version but maintaining the same core framework.

[MacEmilia]

As a seasoned driver, I'm quite accustomed to the symbols of China's emission standards—simply 'Guo' (meaning 'National') followed by Roman numerals, like Guo V or Guo VI. The first thing to check when choosing a car is this symbol, as it determines whether the vehicle can enter urban core areas. I remember how cheap cars were during the Guo III era, but now, with the upgrade to Guo VI, they have better market value. This notation gives us confidence when buying used cars, as lower-standard vehicles tend to have issues during annual inspections and depreciate faster. When chatting about cars, I always remind my friends that higher emission symbols not only benefit the environment but also save money in the long run.