How long the fourth country's cars can be driven depends on the national policy on motor vehicle emission requirements. At present, the sixth country's emissions are only implemented in individual regions, and it is estimated that it will be fully launched in the second half of 2020. This issue is not only about environmental protection, but also about the development of the automobile industry, as well as the upgrading of national consumption. Therefore, the implementation of the Sixth National Day actually depends on the development of the entire economy. According to the current situation that the fifth country is fully implemented and the third country is at the end of the phase out, it is estimated that the fourth country's cars can still be used one year after the sixth country is fully implemented. If it takes two years to fully implement the National Six, it is estimated that the car has been subject to many restrictions, and the cost of testing, including road travel, will also be very high. If you want to sell it, it will be very cheap, so you should make preparations in advance.