1. Shopping malls: play a role in product promotion
2. Enterprise or company: it can promote the brand and provide the grade at the same time.
3. Outdoor advertising screens: can also play a role in lighting
4. Public places: it can play a role in popularizing knowledge, propagating some small knowledge and so on.
5. Stations, etc.: can play the role of bulletin board
6. Traffic: can play an instruction or warning role.
7. When doing activities: you can set off the atmosphere.
