Observing the label on the bottle of Langjiu, generally, real Langjiu will have the words of famous wine and national gold medal, but fake wine will not. The real full name of Langjiu is Langjiu, just two words. There is a big eye-catching lang character on the bottle label, and a small seal-style wine character on the lower right. Although counterfeiters can generally imitate the word "lang" very realistically.

The layout has a strong sense of color, and this standard cannot be reached without good printing equipment and technology. So far, this feature cannot be realized by counterfeit trademarks. In addition, the purpose of comprehensive registration is to prevent counterfeiting and infringement. The State Administration for Industry and Commerce said that any trademark similar to Da Lang is trademark infringement.