{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific steps for upgrading a blockchain?","a":"Design solution: According to the demand analysis, design  new blockchain architecture and technical solutions, including consensus algorithms, encryption algorithms, data structures, etc."}]}],"pr":"91c9653d33f9da0b4aba01a86d2a80cb6bce2d6b26c12397f1723fd103c7179f"}