The pictures of shop signs, doorways and facades can be drawn by hand, made by computer or printed on paper. The materials of billboards are generally welded with square tubes, angle steel, etc. It can have three-dimensional plate, lamp cloth, blister, car paint, gusset plate, aluminum-plastic plate, etc

The main structure of the external light billboard is iron frame plus spray painting, and some are covered with metal edges, plus spotlights. For example, the production of large billboards, such as billboards on the roof and column advertisements, is the heart of the billboards. It is unsafe to have a solid steel structure as support.