What does dual license plate mean?

[LaKevin]

Dual license plate refers to the Hong Kong license plate applied for by vehicles in mainland China. Blue license plate: white characters on a blue background with white borders. This type of license plate is installed on trucks with a total weight below 4,500KG (excluding) and vehicles with seating capacity of 20 people or less and a body length below 6 meters (excluding). It is used for passenger and cargo vehicles below medium size and special purpose vehicles. Yellow license plate: black characters on a yellow background with black borders, used for medium-sized and above passenger and cargo vehicles and special purpose vehicles; semi-trailer tractors; electric vehicles. Yellow plate vehicles generally refer to large vehicles, such as trucks over 2 tons or buses (including vans with 10 seats or more).