{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the operational steps required for a successful blockchain upgrade path?","a":"Code writing: According to the upgrade plan, write upgrade  code, and conduct unit testing and integration testing to ensure the correctness and stability of the code.↵↵5..."}]}],"pr":"946a1d769ea7b6979969102637fcfe87867731383b0fe6625150d017224f19b9"}