Hello, there are anti-counterfeiting signs. Generally, when buying Chow Tai Fook's jewelry, there will be a paper insurance policy, which will be filled out by the customer manually, and it is generally not made by machine. This kind of paper is generally hard, and the date and year on the warranty will be typed out to the minute. Then you will see a vip logo below, with a string of numbers next to it, which is what we call an anti-counterfeiting code, and you can get it online to verify whether it is produced by Chow Tai Fook. Without this security code, it may have never been obtained from Chow Tai Fook's official channels. Chow Tai Fook's brand is still no problem, generally there will be no fakes, but now many of them are not real Hetian jade producing areas, and many of them are extensive knowledge expansion of Hetian jade department: color: color is very important for any jewelry and jade. Fine density determines the jade quality of jade material and whether it is comfortable or not. Jade with good color feels delicate and sticky to the naked eye. Some collectors describe the delicate and moist jade as steamed glutinous rice cakes. The internal structure of jade with good color should not be obvious, but the structure can be seen with a professional flashlight. The finer the structure, the better the quality. If the structure is thicker with the naked eye, the texture is not good. You can't see the internal structure when you look at it with a professional flashlight or with a magnifying glass 10 times. It may not be jade. Jade seed material with almost no structure is the best.