{"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":"091b8590cadd04bf044fd3922342815e4789b59bc321895c685a03ee098e6665"}