{"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":"f82ae77238399fb26d09a6ea65d176a53de950c50d4b1ca00c40c9f67c3da9b0"}