{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology apply to the field of digital identity verification?","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 data."}]}],"pr":"46fa62060011c42c57b0ba4718602892aa55b6b966c64a3df98e64d55a07dc6d"}