{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied in the field of digital identity authentication?","a":"Distributed ledger technology: Digital identity authentication  systems based on blockchain can use distributed ledger technology to store user information, ensuring the security and reliability of the data."}]}],"pr":"c802e08836bd3537949f8ea3f60b6cda5fb6cfebd1f28bb581b8a9917de20cec"}