Outdoor promotional billboard

Billboards are a VI application, an effective means for organizations or corporate entities to promote themselves, commonly used in public places such as streets, factories, hotels, etc.; typically constructed with stainless steel frames, tempered glass or polycarbonate panels, and aluminum alloy roofs, with the panels able to be opened for replacing promotional content.

In some institutions, blackboards are also being used as bulletin boards, such as along the corridors in some units, on both sides of cultural corridors in schools, and on the policy publicity walls of some village groups. Using blackboards as bulletin boards is a common practice.