{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the recovery measures that can be taken if the blockchain upgrade is not successful?","a":"Fix code vulnerabilities: Address the reasons for the upgrade failure  by repairing the relevant code to ensure the normal operation of the blockchain system."}]}],"pr":"54cfe1f9beb8bdc6bbce35b04cce6dc0234e5e1d4576e23d37b1c44ef9dd21bb"}