On July 7, Qilu Daily published a report that "there are many problems in the upstream and downstream of the meat traceability system, and the field visits found…". According to the report, the reporter visited a vegetable market in Lixia District of Jinan City and a large convenience store supermarket found that there are many problems in the upstream and downstream of the product traceability system. The quality inspection party also said that for the food industry with extremely complicated supply chain, it still faces the problem of missing, scattered and asymmetric information. It is worth mentioning that under the current circumstances, brand buyers are responsible for carrying out their own product information, and there is no way. To realize the traceability of blockchain traceability, the key is to trace the credibility.