{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the precautions needed for blockchain upgrading?","a":"Ensure  code security: Strictly review and test the code during the blockchain upgrade process to prevent potential vulnerabilities and risks."}]}],"pr":"2db4dad72311a64f59205e5c99e190540c217a0a8f41c399d34e1e8d7c0df9c2"}