{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What should be done if there are issues after a blockchain upgrade?","a":"Analyze the cause of the problem: Firstly, a detailed analysis of the issue  is required to understand its underlying reasons. This may include technical issues, security problems, consensus algorithm issues, etc."}]}],"pr":"fc76319c584bf3cca379f190db441516f58897791bb13faf766b587d6627dc7b"}