{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to handle the risks of blockchain upgrading?","a":"Backup and recovery plan: Establish a backup and recovery plan for the blockchain  data, ensuring the safety of the data in case of any unexpected situations during the upgrade."}]}],"pr":"c221efdbb5a7109a986a46cb73fb5891b20cc696ab82f2b6cf7d3fe9aa5eea98"}