{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the regular steps for upgrading a blockchain?","a":"Solution design: According to the  requirement analysis, design the upgrade solution. This includes selecting the appropriate consensus algorithm, optimizing the network transmission protocol, and improving the smart contract programming language, etc."}]}],"pr":"fcc0abed19911cb67dc459d6ce5832ec7a9ffee485a6fd4cbea99c407a1bfccb"}