What are the National 4, National 5, and National 6 standards?
4 Answers
The National 4, National 5, and National 6 standards are marked as National IV, National V, and National VI respectively. Here is some additional information: 1. Some cities or regions have gradually started implementing the National 6 standard, which is known as the National Sixth Stage Motor Vehicle Emission Standard and is considered the strictest emission standard in history. 2. The National 6a standard is used as a transitional phase from National 5 to National 6. 3. As environmental pollution issues become increasingly prominent, countries around the world have introduced strict emission standards to regulate automakers. With these strict standards, automakers can produce more environmentally friendly vehicles. 4. Strict emission standards help phase out older vehicles that do not meet emission requirements, playing a positive role in protecting the Earth's environment.
When I bought a car before, I paid attention to China 4, China 5, and China 6 standards. These are the codes for China's vehicle emission standards. Simply put, they are national pollution control requirements, with higher numbers indicating stricter standards. China 4 was introduced around 2014, mainly limiting harmful exhaust emissions like carbon monoxide and nitrogen oxides. China 5 started in 2017 with even stricter requirements, mandating better filtration technology in vehicles. China 6 has just been implemented recently, divided into phases a and b, with restrictions doubled, especially on particulate matter and benzene emissions. Friends buying new cars should note that China 6 vehicles are more environmentally friendly and fuel-efficient. For car owners, vehicles with higher standards might cost more, but maintenance is simpler, and they help reduce air pollution, making them a good deal. When choosing a car, we need to consider local policies, as many cities have restrictions on older vehicles.
I think the China 4, China 5, and China 6 emission standards are really crucial. They are mandatory indicators established by China to protect the environment. The China 4 era was more of a starting point, imposing basic restrictions on pollutants, but the effects weren't very noticeable. With the upgrade to China 5, the requirements significantly tightened, imposing stricter exhaust standards for both gasoline and diesel vehicles. Now, China 6 is even more rigorous—Phase A targets new vehicle models, while Phase B enforces comprehensive implementation, substantially reducing emissions and helping improve urban air quality. As someone who cares about environmental protection, I firmly believe the promotion of these standards should be accelerated, because vehicle exhaust is one of the main causes of smog. Promoting China 6-compliant vehicles also reduces fuel consumption, killing two birds with one stone. Everyone should opt for low-carbon vehicles more often to support a greener lifestyle.
China 4, China 5, and China 6 are essentially emission control tiers. China 4 was implemented in 2008 with relatively lenient limits, such as allowing higher nitrogen oxide emissions. China 5, introduced in 2013, imposed stricter regulations and added real-time monitoring capabilities. China 6 is now divided into a and b phases: phase a aligns with Euro 6 standards, while phase b is more advanced, significantly lowering emission limits, especially for particulate matter, requiring vehicles to adopt advanced exhaust treatment systems. Technically, upgrading standards drives automakers to innovate, improving performance while reducing pollution, directly impacting the environment. It is expected to further promote the adoption of electric vehicles in the future.
