{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the risks and emergency recovery plans for blockchain upgrades?","a":"Technical emergency recovery plan: If problems occur during the upgrade process, quickly initiate backup data and code, restoring to the previous normal version to ensure system  normal operation. Meanwhile, investigate and analyze the issues that occurred during the upgrade process."}]}],"pr":"091a3776d7d7f4ef18eed8a3a1c89642b80bc513f367f664f85c776f3641cd19"}