{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the execution risks involved in implementing a blockchain upgrade?","a":"Data loss risk: During the upgrade process, data loss may occur, such as failed  node data synchronization or data storage failures, which will cause the blockchain to lose some or all of its historical data."}]}],"pr":"eb5616628a96fd9ff04ea00c7b0500484749d41d2281059a6c80c71c5e0f91d3"}