{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the functions of the Handler in the blockchain upgrade module?","a":"Upgrade  strategy formulation: According to the needs of the blockchain system, develop appropriate upgrade strategies, such as upgrading versions, optimizing performance, and fixing vulnerabilities."}]}],"pr":"db804d6cc931f880470c1e9d2a37c412bc8dd079163bd51144d0a6c39fe4ce67"}