Longpai Gypsum Board is the only famous brand in China and a well-known trademark product in China. Designated products of Olympic Games, World Expo projects and most key projects in provinces and cities. At present, counterfeit products are rampant in the market, so you must pay attention to identification when buying: 1) Look at the names on the side paper: all the listed products such as Longpai gypsum board are called "Longpai", "Boutique Longpai", "Quality Longpai" and "Xinlong Brand" are fakes. 2) Look at the anti-counterfeiting label: there are anti-counterfeiting labels on the edge of Zhenlong brand gypsum board, and each identification code is different. You can follow the prompts to inquire, and the identification codes of fake dragon cards are all the same. 3) Look at the black characters sprayed on the surface of gypsum board: because the real dragon brand is an assembly line, the position and production time of the characters on it are different, while the position and production time of the characters on the fake dragon brand are generally the same. The method of distinguishing the authenticity of drilling cement! ! ! 1. Call them to report the batch number on the back of the cement, which can preliminarily screen the authenticity. This batch number is a number of a batch of cement, so it is possible that all the cement delivered to you are the same number, which also provides an opportunity for counterfeiting.