1. From the appearance:

Domestic tabletting is relatively late. Basically, 94 years ago, tabletting was mainly imported and sold domestically. Generally, there are not many tablet companies for early films. It's easy to tell. European and American moderators are mainly German Silver Circle, Swiss Silver Circle and Shenzhen Silver Circle. SF，

2. From the weight of the film:

Early films were relatively heavy, generally above 15g, and above16.5g. Pirated films had a shallow foundation and blurred printing, especially the fonts in the inner ring of the CD, which was incomparable with the original CD. The original font is clear, and the pigment is mainly UV glue. Unlike today's movies, very fine words can be printed clearly. The box is also thicker, so it will feel heavier in your hand.

3. Observing from the issuing company:

The early CD versions are mainly divided into Sanyo, Sony, Tianlong, Toshiba, Mitsubishi, Germany, France, America, Australia, Korea and Hong Kong.

4. From the album cover:

Every album has a fixed album name and cover. If the album name is different from the cover, it must be pirated. For example, the album Red can only be called Red. If someone tells you that there is an album called Blame You for Being Beautiful, even if its tracks are exactly the same as Red, it is pirated.

5. Observing from the anti-counterfeiting mark:

Imported audio-visual products that are not affixed with the anti-counterfeiting mark of audio-visual products and the anti-counterfeiting mark of China Book Import and Export Corporation at the same time must be illegal audio-visual products. At present, all imported audio-visual products are affixed with anti-counterfeiting marks in paragraphs A-III. The imported video products are marked as imported by China Book Import and Export Corporation.