The ceiling ceiling angle line is divided into 1. Plastic corner (commonly used in plastic steel ceiling) 2. Film covered corner (because it is easy to change color, it has been basically eliminated). 3. Frosted roll coating corner: the surface is painted with nano technology, which is the mainstream product in the market at present. 4. Anodized corner: the surface treatment is anode electrolysis process, the product is environmental friendly and never fade. 5. Carving corners, after oxidation, carving process, more colors.Ceiling is a kind of decoration on the top of the housing living environment, which plays a role in beautifying the house.