{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The formation process in blockchain is as follows:","a":"Filling in the parent hash value: Generate a hash value for the data of the previous block's  block header through the SHA256 algorithm, and fill it into the parent hash value of the current block."}]}],"pr":"5dffd0bc1fcf9aad7b17392269681f3ee2c7c7717f94b4080bb4e075c34b6d52"}