1, look at the tag, look at the logo, and each tag must have an internal code. It can be found in specialty stores, but even if there is a code, there is a big gap between high imitation and real in sense and quantity. 2. The way to distinguish authenticity is that all the tags are very different from ordinary ones. They are not easy to break after bending, and they are tougher than ordinary ones, and they are very flexible when bending. 3. Explain in detail that 0 1 1 represents the year 1 1, and so on. 04 represents the month.