{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the normal recovery process after a failed blockchain upgrade?","a":"Obtain fault information: After understanding the  reasons for the upgrade failure, relevant fault information needs to be collected, such as error logs, system monitoring data, etc., to facilitate further diagnosis of the problem."}]}],"pr":"75fb7b5ca89c6bed2c519974dd1dc5e42c3c14d092d403054faefca6af4c2b85"}