{"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":"Unchangeable records: Blockchain uses encryption algorithms, once the data  is recorded in the block, it is difficult to tamper with, making the food safety traceability process more transparent and trustworthy."}]}],"pr":"8d04ea9dfffe84669ff9ddfb52183a5943611f10b77cbe7d8197b04aeae43ce3"}