With the increasing competition in the ceiling market of soft-film ceiling (membrane ceiling), soft-film ceiling ceilings, supporting keel accessories, and tools and equipment are now used in small workshops for small businesses to maximize profitability. Unqualified products lure customers to fraudulently qualifying products at low prices. Brand shop: Ceiling One of the following features is substandard or counterfeit products: 1. Class b fire detection reports (recent) or inspection reports issued by the National Fire Protection Building Materials Quality Inspection and Supervision Center are not published on the National Fire Protection Building Materials Online. 2. The film material did not stop burning in 2-3 seconds with a fire and gave a very pungent taste. 3. The hand touch has a slight sense of stickiness and static electricity or it is harder and softer. The material is easy to attract dust. The film material will change color within two months, prone to sagging in the winter, tends to shrink in winter, and has a poor stability and a short service life. 4. It is easy to tear the film material when tearing the film material. Pressing the film material with the thumb on the film with the frame can not be restored slowly in 4-10 seconds or leave traces of extrusion. 5. When the sample of the membrane material is placed under the nose, there will be a slight pungent smell of crude oil, containing volatile and harmful heavy metal substances. 6. The supporting aluminum alloy structure is relatively small or the aluminum material is easy to decolorize by hand. When the bending occurs, cracks appear on the surface, and the surface is not provided with anti-oxidation treatment. 7. When the factory was inspected, the workshop was smaller or in the residential building. Only 3-5 individuals played various roles, and there was no guarantee for the post-installation maintenance. 8. The old salesman and you talked that he is a relative of a well-known company or originally worked in a company, and the product quality is the same as the product quality of a famous company. Users do not want to buy cheap and unfair inferior products. To buy ceiling must buy good quality, we can go to the building materials store to see ceiling products! Ceiling aluminum alloy 