I heard that Metro has a great traceability system. I don't know what's the use.

The traceability system you mentioned is an application of the Internet of Things, that is, the traceability system of food quality and safety.

The so-called food quality and safety traceability system is a comprehensive management and service platform that uses automatic identification and IT technology to help food enterprises monitor and record the information of key links such as food planting (breeding), processing, packaging, testing and transportation, and present these information to consumers in real time through the Internet, terminal inquiry machine, telephone and SMS. In other words, you can track all the links from the source to the sale of each commodity, which can improve the safety of the commodity you want to consume.

"German retail giant Metro has always been the most powerful promoter and executor of RFID technology. To this end, Metro has specially established an RFID concept store as a demonstration and experience of the use of RFID technology in the retail industry and related management. "

I hope to give you a reference.