{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the risks involved in the process of blockchain upgrading?","a":"Security risks: Hackers may exploit vulnerabilities in the upgrade process to attack the blockchain, such as double-spending attacks, Sybil attacks,  etc., thereby posing security risks to the blockchain system."}]}],"pr":"c621df75ea24a032494ea564bc53da8dbd9db372ba4a35e1ce666b833b0e8acc"}