{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain be applied to electronic evidence preservation?","a":"Immutable characteristics: Blockchain technology has the characteristic of data being impossible to tamper with, making the electronic evidence stored on the blockchain authentic and reliable, effectively preventing the  tampering of evidence."}]}],"pr":"95b7eb2a8220a19ee508a9e629dcef4f3cf65735f889594c1450454459cad640"}