{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the handling process after a failed blockchain version upgrade?","a":"Fault diagnosis: The blockchain system will initiate a fault diagnosis mechanism to find the cause of the upgrade failure. This may include checking node logs, network connections, and other factors that  may have contributed to the failure."}]}],"pr":"f3bdd2e65a9896eab29f2770a711c55f3cb9d0902c6c088169b97171acf58a19"}