
National II standard vehicles are very old cars, and most regions do not allow them to be driven on the road. The following introduces the National VI standard regulations and the differences between National VI and National V: National VI Standard Regulations: The Ministry of Ecology and Environment issued the "Limits and Measurement Methods for Emissions from Heavy-Duty Diesel Vehicles (China VI)" (referred to as the National VI Standard for Heavy-Duty Vehicles). The National VI standard will be implemented in two phases: National VIa and National VIb. National VIa will be implemented for gas-powered vehicles on July 1, 2019, for urban vehicles (urban buses, sanitation vehicles, postal vehicles, etc.) on July 1, 2020, and for all vehicles on July 1, 2021. National VIb will be implemented for gas-powered vehicles on January 1, 2021, and fully implemented for all vehicles on July 1, 2023. Differences Between National VI and National V: The emission limits for nitrogen oxides (NOx) and particulate matter (PM) are 77% and 67% stricter than National V, respectively, with the addition of a particle number (PN) limit requirement. The engine test conditions have been changed from the European Steady-State Cycle (ESC) and European Transient Cycle (ETC) to the more representative World Harmonized Steady-State Cycle (WHSC) and World Harmonized Transient Cycle (WHTC).

I have a National II emission standard car that I've been driving for nearly twenty years. It's still roadworthy, but many major cities like Beijing and Shanghai have strict restrictions, such as prohibiting entry into restricted zones or banning driving during peak hours, with fines of several hundred yuan. Policies in other cities are more lenient, and driving in suburbs or small towns is not a problem. During annual inspections, emission requirements are becoming increasingly stringent. If the car exceeds the standards, it won't pass the inspection, and repairs or the installation of emission reduction devices are necessary to keep it on the road. Personally, I think maintaining an old car is cost-effective, and its fuel consumption isn't high. However, for the sake of air quality and compliance with regulations, I avoid restricted zones and check local traffic apps for the latest policies. I recommend regular of the engine and exhaust system to ensure passing the annual inspection, continuing safe driving, and avoiding unnecessary trouble.

As an environmental advocate, I'm concerned about the burden of vehicle emissions on the environment. China II vehicles are highly polluting with significant PM2.5 emissions, negatively impacting air quality. Most cities now implement low-emission zone policies, essentially banning China II vehicles in urban cores. Many owners have switched to newer models or public transport. I believe this is a positive trend promoting sustainable development. If you must drive a China II vehicle, remote rural areas or off-peak hours may still permit usage, but always check local traffic restriction maps to avoid prohibited zones. The government offers vehicle retirement subsidies to encourage switching to energy-efficient models – a worthwhile consideration as pollution reduction ultimately benefits society.

From a technical perspective, the National II emission standard is relatively outdated, with simpler exhaust treatment systems that are prone to exceeding limits. During strict annual inspections, vehicles that fail to meet standards cannot be driven on the road. During , installing a catalytic converter can help meet the standards. However, in large cities like Guangzhou, non-compliant vehicles are directly restricted from entering core areas. I recommend regularly cleaning carbon deposits to maintain engine efficiency, avoiding long-term use of high-sulfur fuels to extend service life. In other regions, these vehicles can still be driven freely, but it's important to stay updated on policy changes—safety first.

From an economic perspective, the fuel efficiency of National II emission standard vehicles is decent, and costs are low. However, urban driving restrictions significantly reduce their practicality—they become worthless if you can't drive them in the city, though they remain cost-effective in rural areas. The risk of failing annual inspections has increased, and repair costs may not justify keeping an old car compared to investing in a new one. I believe weighing the pros and cons suggests that minor investments can sustain an older vehicle, but the risks are higher in big cities. Currently, there are subsidies encouraging the retirement of such vehicles—consulting relevant policies can help minimize potential losses. Be mindful of choosing suitable areas to drive in to maximize benefits.

Looking back at history, National II emission standard vehicles represent outdated technology. Current policies prioritize environmental protection, leading to updates such as many cities establishing restricted zones—for example, Beijing prohibits their operation within the Sixth Ring Road. A decade ago, driving them was unrestricted, but now they face limitations. I cherish the nostalgia for classic cars; some owners restore them for or operate them in designated exhibition areas. Generally, they can still be driven in appropriate locations, but policies continue to evolve. We must adapt to changes and remain compliant to avoid trouble.


