{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the steps required to recover a node after a blockchain upgrade?","a":"Synchronize block data: The upgraded node needs to synchronize data with the existing blockchain  network, which includes downloading and validating all previous block data. The synchronization process may take some time."}]}],"pr":"1b576bedb7aed31dfd447514c49c331d82aa5876aebb44f481bebbc331cb04a7"}