What's the difference between the film with by Cheyishang company and the ad film on buses, the protective film coated on new cars as well as other kinds of film?

nan

There are great differences. The ad film used on buses would curl after using for a long time. The adhesion strength of its backing gum is not good enough. And the protective film coated on the paint of new cars is usually transparent or white. It's too thin that the protective effect is not good. Glue and its residue may remain when tearing it off after a long time. And it has poor ductility.