{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the handling method for a failed blockchain upgrade?","a":"Check the node status: Confirm  the status of all nodes to ensure that they are all operating normally. If any abnormal nodes are found, they need to be repaired or replaced in a timely manner."}]}],"pr":"53bcf89855b01244755853023eb6fe4d7d42d858095ba2debc729db5931ec8d3"}