Why is the vehicle inspection label yellow?

[LaTyler]

The yellow label for vehicle inspection is only used to distinguish the year of inspection expiration. Currently, there are three colors for vehicle inspection stickers, with a three-year cycle that is standardized nationwide, making it convenient for traffic police to check. Non-commercial vehicles are exempt from on-site inspection within the first 6 years, only requiring an inspection mark application every two years. For vehicles older than 6 years but less than 10 years, inspection is required every two years, meaning private cars only need on-site inspections twice within 10 years, specifically in the 6th and 8th years. Private cars aged 10-15 years require annual inspections, while those over 15 years old require inspections every six months. Commercial passenger vehicles within 5 years require annual inspections; those over 5 years require inspections every six months. Trucks and large/medium non-commercial passenger vehicles within 10 years require annual inspections; those over 10 years require inspections every six months. Motorcycles within 4 years require inspections every two years; those over 4 years require annual inspections. Vehicle inspection mainly includes the following items: Appearance inspection: Mainly checks vehicle lights, body appearance, suspension, sunroof, and tires, ensuring lights function properly, no unlit lights, no unauthorized body color changes, and no modifications to the suspension. Emission test: Checks whether the vehicle's tailpipe emissions meet national standards during high-speed operation. On-site inspection: Primarily examines the vehicle's braking system, headlights, horn, and chassis. Violation check: Before the inspection, all traffic violations must be cleared to pass. Vehicle inspection can be done up to 90 days in advance but must not be overdue. Consequences of overdue inspection include: Vehicles not inspected on time are not allowed on the road; driving an uninspected vehicle results in a 3-point penalty and a 200 RMB fine. If an uninspected vehicle is involved in a traffic accident, the driver bears full or primary responsibility, and insurance will not cover it. Driving an uninspected vehicle is considered illegal driving and may result in vehicle impoundment.