{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to traceability and origin tracking?","a":"Decentralization: Blockchain technology uses distributed nodes to jointly maintain data, without a single central controller. This ensures the security  and objectivity of the data."}]}],"pr":"1562e882ad939c49316969f3fb019fdf676aafe8ddb68dbf74a7e92995c4835f"}