Additional installation is not allowed and it is illegal to modify the vehicle without permission.
Article 16 of the "Road Traffic Safety Law of the People's Republic of China" stipulates that,
No unit or individual shall engage in the following acts:
(1) Assembling machines Motor vehicle or without authorization changing the registered structure, structure or characteristics of the motor vehicle;
(2) Changing the motor vehicle model, engine number, frame number or vehicle identification number;
(3) ) Forge, alter or use forged or altered motor vehicle registration certificates, license plates, driving licenses, inspection marks, and insurance marks;
(4) Use registration certificates and license plates of other motor vehicles , driving license, inspection mark, insurance mark.
Extended information
According to Article 17 of the Ministry of Public Security's "Motor Vehicle Registration Regulations"
If any of the following circumstances occurs, Without affecting safety and identification of number plates, motor vehicle owners can make changes on their own:
(1) Install front and rear anti-collision devices on small and micro passenger vehicles;
( 2) Freight motor vehicles are equipped with windshields, water tanks, tool boxes, spare tire racks, etc.;
(3) Motor vehicles are equipped with interior decorations, etc.
Baidu Encyclopedia-Illegal modified vehicles
Baidu Encyclopedia-Road Traffic Safety Law of the People's Republic of China