{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the unexpected situations that may occur during the blockchain upgrade process?","a":"Failure of consensus algorithm: The consensus algorithm is one of the core technologies of blockchain, and  issues during the upgrade process may lead to the entire network's paralysis."}]}],"pr":"7017b96fefacfdae7ed549a2fec23fabde7c2c7bbce4483929ea660de9df87b9"}