{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific steps for upgrading a blockchain?","a":"Testing and verification: Conduct testing and  verification on the upgraded blockchain system to ensure the effectiveness and security of the upgrade."}]}],"pr":"1b0717a3ae23d9519ac7b6745e09d954851c84330adbbad77ee640f99dd86457"}