{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the steps involved in upgrading a blockchain?","a":"Code Writing: According to the upgrade plan, modify and optimize the underlying code of the blockchain to implement new functions  and performance improvements."}]}],"pr":"ce19db8fc2605f35d6e3ed860f68e0d36cf84055cf0b75dbe5b5d5b4dc4965bd"}