{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the potential risks of blockchain upgrading?","a":"Consensus risks: In the upgrading process, problems may arise in the consensus algorithm, such as double-spending attacks and malicious node  manipulation, which affect the normal operation of the blockchain."}]}],"pr":"3ffffdc8f39c23f85f2b5acbdd43fe79be36d758085424fc4eecf04be74c3b16"}