1. How to identify Shanghai Audio and Video and Shanghai Audio and Video tapes: The sticker on the tape has two small rounded corners, which are genuine, including four small rounded corners. If it is a large rounded corner, it is a pirated one. Summary: How to identify Jay Chou Hello, my answer to your question is: 1. How to identify Shanghai audio and video tapes and Shanghai audio and video tapes: The sticker on the tape has two small rounded corners, which means it is genuine, including four small rounded corners. If If the two corners are rounded, it is a pirated version. Answer 2. How to identify American card tapes: The two corners on the tape sticker are cut corners and are genuine. If the two corners are rounded, it is pirated. Answer 3. How to identify Hunan Jinfeng tapes: On the tape The stickers have cut corners, and the main body is not transparent. If the tape is yellow, it is genuine. If the tape is transparent or has small rounded corners, it is pirated