{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to handle a failed blockchain upgrade?","a":"Consensus algorithm issues: Analyze the consensus algorithm used in the blockchain system, and adjust or optimize it if necessary to improve the efficiency and security of the  blockchain network."}]}],"pr":"bf9b01f08ff0dc35e65a4312bce09e553271d19dc80bb6b46a2d7b4ab6915a03"}