{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the risks of blockchain upgrading?","a":"Technical risks: During the upgrade process, technical failures such as code errors and security vulnerabilities may occur in the blockchain system, thereby affecting its stability  and security."}]}],"pr":"c65e35985e6cfa18425a21b60a989ef212998989af8cc894e000f7d1483c8c9a"}