{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the requirements for taking data snapshots and backing up blockchain data?","a":"Data integrity: Snapshot backup needs to ensure that it includes all blockchain data, including transaction records, account information, block header, etc. In addition, the backup data also needs to be encrypted to ensure the security of  the data."}]}],"pr":"daadf59673cf4fec68ac547b95a1bb8fc4e0d4691cbc8ae11390a0f066db36ee"}