According to the provisions of the Road Traffic Safety Law of the People's Republic of China, cars with blue number plates are ordinary hybrid vehicles, and cars with green number plates are pure electric vehicles or plug-in hybrid vehicles. It must be audited by the traffic control department and effectively registered before driving on the road, so the green license plate with indicators in Tianjin cannot be changed to blue.
The blue card is suitable for conventional fuel vehicles, and the green card is the license plate of new energy vehicles. The green license plate adopts two-dimensional bar code, anti-counterfeiting shading and other anti-counterfeiting technologies, which can improve the anti-counterfeiting performance of the license plate to a certain extent.