{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the regular steps for upgrading a blockchain?","a":"Code writing and testing: According to the upgrade solution, write the new version of blockchain code. During this process,  continuous functional testing, performance testing, and security testing are required to ensure that the upgraded blockchain system works stably and securely."}]}],"pr":"9a91fc84f5bae648c48c65fba7f56814afaa2e23404cbc232988a23547bbe2c8"}