{"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":"8c386b245ead227422d9bfbd98b50a157a5426109a75e5aad5eb41ecf2131415"}