{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied to certificate management?","a":"Data immutability: The data in blockchain technology uses encryption algorithms, and once the data is recorded in a block, it is difficult to modify. This attribute  makes blockchain an ideal tool for evidence preservation, ensuring the integrity and authenticity of the preserved data."}]}],"pr":"5a190ef5383422a5f4c025ca50da77ad47459ad8d07784ec555d1b3e3b41091d"}