{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the verification steps required before upgrading a blockchain?","a":"Data Consistency Check: Check the consistency of blockchain data  to ensure that no data is lost or damaged during the upgrade process."}]}],"pr":"d377a930b86666712f2b798cfed11dacedbf624eb5f5214f8d39176e45715e62"}