If you want to buy pure mainland licensed goods, the method is simple. There is a serial number on the regular licensed package and a serial number on the sound card. The two numbers should be the same, and the serial number can be verified by Innovation Customer Service. If it fails, it is not licensed. Many innovative sound card chips are just printed words, not laser carved. High-end card chips are basically covered with heat sinks, and the words on the chips can't be seen at all. In addition, there is always innovation.