{"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":"Code writing: According to the upgrading solution, modify and optimize the  underlying code of the blockchain, including consensus algorithm, encryption algorithm, data structure, etc."}]}],"pr":"63652990dbc91227420037e8d0fb0522d182b3297d73576727f3f276d5be0292"}