Paper: Compare and analyze the advantages and disadvantages of barcode, QR code and RFID tag in the traceability of animals and animal products.

Bar code: Is it inconvenient to scan animals? Someone has to chase the scan?

QR code: It is convenient to attach more information, such as websites, animals, etc. If it is inconvenient, it is the same as above.

Rfid: It combines the advantages of two-dimensional code, and it is convenient to read information, and it is not afraid of animals running around.

Unique code: this is only suitable for library management, not for animal tracking.