What is the difference between National 4 and National 5 vehicles?

[SanGriffin]

National 4 and National 5 vehicles differ in the following aspects: 1. Price difference: National 5 vehicles are equipped with additional components compared to National 4, and automakers incur extra costs from vehicle declaration, various tests, and production, resulting in National 5 vehicles being significantly more expensive than National 4 vehicles. 2. Road access rights and entry restrictions: Many local policies impose traffic bans on vehicles with lower emission standards, and some older vehicles with outdated emission standards may even be completely prohibited from road use, leading to restricted access or limited driving areas. 3. Residual value difference: Due to factors such as scrapping deadlines, road access restrictions, and entry limitations in certain areas, vehicles with the same condition but different emission standards may have vastly different residual values. Additionally, vehicles with excessively low emission standards are harder to sell.