{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the key events triggered by the blockchain upgrade module?","a":"Upgrade preparation: When the blockchain system needs to be upgraded, the first step is to perform upgrade preparations, including checking the node version, distributing the upgrade package, and notifying relevant  personnel for the upgrade."}]}],"pr":"5f6eeeb0d8cf85235a43a3d1ef61ce3c1f27e7be47b188e79cea9a49a802a033"}