{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the operational process after a blockchain upgrade fails?","a":"Analyze the reasons: First, a deep analysis of the reasons for the failure of the  upgrade is required, which may include technical issues, network failures, node anomalies, etc."}]}],"pr":"72cffc3d7dc7e8d52460bfe791ba754d14cd5010b853b09d243e67687996d342"}