
National II emission standard vehicles can still be used for how long depends on the specific situation. The details are as follows: 1. Requirements vary by city: Currently, in first-tier cities, National II emission standard vehicles are not allowed to drive within the Fifth Ring Road on weekdays. 2. Not diesel engines: In most third and fourth-tier cities, National II emission standard vehicles are not a big problem as long as they are not diesel engines. It is best to verify with the local vehicle office for safety. 3. National II standard: This is China's second phase of vehicle emission standards. The National Phase II emission standard is equivalent to the Euro II emission standard, meaning the content of tailpipe pollutants is equivalent to that of Euro II.


