{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What specific content can be queried in a blockchain historical information query?","a":"Transaction details: Detailed records of the sender, recipient, amount, and digital signature of the sender for each transaction. Through these information, transaction records can be queried and the authenticity  of transactions can be verified."}]}],"pr":"73f127ae21a290691723df9629330f386cc0e9b714d754bd4d1cf45af379dffc"}