{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology solve the copyright protection problem of digital content?","a":"High transparency: The blockchain  is a public database that allows users to view the transaction records and"}]}],"pr":"b3e7c66b94d2bb2fd416287910b2d9cde1ba8b6f67bcd87d68610ff67d63b309"}