What is the difference between Shanghai A and Shanghai B license plates?

[OHarrison]

There is no difference between Shanghai A and Shanghai B license plates; the only distinction lies in the sequence of application. When Shanghai A plates are exhausted, Shanghai B plates are issued, followed by Shanghai D, then Shanghai E, and so on. Currently, only Shanghai C plates are special as they are designated for suburban areas and are not permitted to enter the city center. The purpose of license plate numbers is to identify the vehicle's registered region through the plate, and they also allow authorities to trace the vehicle's owner and registration details. License plates, also known as vehicle registration plates, are panels mounted on both the front and rear of a vehicle, typically made of aluminum, plastic, or stickers. These plates display the vehicle's registration number, registered region, and other basic information.