{"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 Management: According to the requirements of the blockchain system, develop appropriate upgrade strategies, such as  determining the upgrade time, version information, etc."}]}],"pr":"5f221b9cd5bc95388280e396ab44c12f11509ae239740ce41463fd4ea5c1b9d7"}