The above codes and identification method are suited to the similar wheat flour supply chain, but some changes must be made to fit different scenario. The process batch includes 1 digit of code to identify the processing assembly line; if a large milling enterprise has more than 10 processing lines, the process line encoding can be expanded to two digits, which can express up to 100 lines. For identification technologies, barcode or RFID can be selected according to the reading range, writing capacity and cost requirements.