{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific steps required for a blockchain upgrade?","a":"Demand analysis: Firstly, clarify the goal of upgrading, analyze the problems and shortcomings of the existing blockchain system, as well as the issues expected  to be solved through upgrading."}]}],"pr":"0eecc390c03c699880fbeec6da15d0df3eb482eceb939b1f655045c457e0632c"}