{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The backup operations before blockchain upgrading include the following contents:","a":"Node data backup: Node data includes the entire blockchain network's transaction data, block data, and other related data. Backing up node data ensures the consistency  and integrity of the blockchain network after the upgrade."}]}],"pr":"225e2d46c55ad30f828e3c8b3461e83a817362722fe16ec4234ed555f0aca6f6"}