What does license plate deck mean?

Deputy brand basically refers to the second-line brand of a certain brand.

Double license plate means that motor vehicles in two places hang double license plates. For example, direct traffic between Hong Kong, Macao and the mainland and some vehicles that cross the border frequently require two license plates.

Because the mainland, Hong Kong and Macao belong to different customs territories and have different legal systems, the free movement of motor vehicles cannot be completely liberalized, so it is necessary to establish corresponding registration and inspection systems for entry and exit vehicles.