Chuan O-license plate with white characters on blue background and black characters on yellow background. What do these two license plates stand for?

O brand is a brand issued by the vehicle management office directly under the public security department, which is used for administrative vehicles of provincial organs and vehicles of provincial enterprises and institutions.

OA is a public security administrative vehicle in Chengdu.

Small cars, including ordinary cars, number 0 cars and government-specific cars, are all blue cards, while large cars, driving school coaches and motorcycles are all yellow cards.

Black cards on foreign cars

O-brand police cars represent Sichuan Provincial Public Security Department (Sichuan OA/KOOC-0/234 police), High Court (Sichuan OB/KOOC-0/23 police), Provincial Supervision Department (Sichuan OB/KOOC-0/23 police), National Security Department (Sichuan OC/KOOC-0/23 police) and Justice Department (Sichuan O D 663)

Cheng O is the head of military vehicles in Chengdu Military Region.