{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the specific steps for upgrading a blockchain?","a":"eview and approval: Submit the upgrade  proposal to relevant authorities or stakeholders for review and approval."}]}],"pr":"9b52a93743f700279032b7341e3dd286e7d25a85135db1e9696cdaf66069d9e5"}