{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific steps for upgrading a blockchain?","a":"Demand analysis: Identify the goals and requirements of upgrading, such as improving performance, expanding functions, and optimizing user experience, by addressing the problems and shortcomings of the existing  blockchain system."}]}],"pr":"50e463e65a32fc7bf023b928949edc56648d1d66038f4daef413e3d8aa12a8ab"}