Which region does the license plate 'Ping' belong to?

[IkerLynn]

There is no vehicle license plate with the character 'Ping' in any region of our country. Here is some relevant information: 1. Vehicle license plates are standardized hard-number plates with a unified format and style, issued by vehicle management authorities after reviewing, inspecting, and registering vehicles that have applied for license plates. These plates bear a unique registration code. The vehicle registration certificate, issued by the vehicle management authority, records the main details of the vehicle's initial registration. It is kept by the owner and carried in the vehicle as a standardized registration booklet for recording changes and inspections. According to the 'Road Traffic Management Regulations,' the vehicle license plate and registration certificate are the legal documents permitting a vehicle to operate on public roads. 2. Vehicle license plates are the abbreviated term for both the license plate and the vehicle registration certificate. The 'Urban and Highway Traffic Management Rules (Trial)' issued in 1972 renamed the registration certificate as the 'vehicle registration certificate.' Typically, a vehicle has two license plates, installed at specified positions on the front and rear of the vehicle. Vehicle license plates are the legal credentials allowing a vehicle to operate on roads, serving as proof for road traffic management departments, public security authorities, and the general public to monitor, identify, remember, and trace vehicle movements.