{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to food safety traceability?","a":"ransparent supply chain: Blockchain technology makes the information of each  link in the supply chain public and transparent. Consumers can query the origin and circulation of food through the blockchain."}]}],"pr":"7c9647798e0a9a95593a556248d9f123af1e08c0b6986305e6f58b9216219ecd"}