{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the handling principles for dealing with failed blockchain upgrades?","a":"Risk assessment and management: Before carrying out a blockchain upgrade, adequate risk assessment should be conducted, and corresponding risk response measures should be formulated. In case of upgrade failure, the impact scope and severity  should be quickly assessed."}]}],"pr":"61fc071ba7a296562b178070126373385c21c613e5555d9d505779f41c3b442b"}