Isn't it illegal to rent a taxi without an advertisement lamp?
It's against the law. You need to change the body color to the vehicle administration. If you are in Shenzhen, then prepare the following materials: vehicle registration certificate, driving license originals, 45 body photos, the organization code certificate copy, frame number rubbing, to advertising companies can also help you for approval
However, in the 1 or 2 tier cities, irregular top advertising may be illegal. If it is the 3 line of the city, in the inspection is not too strict, or can. Strict words must also top billboards.
Not illegal, but if you start the company let you top advertising, you must be top, otherwise there may be fined.