{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to create a complete data snapshot before exporting chain status in blockchain?","a":"Obtain blockchain data: Retrieve all block data before the specified time point, including block headers and block bodies, from a blockchain  browser or relevant interface."}]}],"pr":"a918f6bca005287f274c7f1bdd8eb23c453fc53c46a9777b60c5099dd245c00d"}