{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology play a role in the field of traceability?","a":"Decentralization: Blockchain technology uses a distributed node consensus mechanism, avoiding a single centralized data storage and management system, making data more secure, reliable, and difficult to tamper with. This provides a reliable technical foundation for food safety traceability."}]}]}