{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied in the field of electronic evidence preservation?","a":"Data tampering prevention: Blockchain technology ensures the authenticity and integrity of the data once it is uploaded to  the chain through encryption algorithms and consensus mechanisms. Any attempts to tamper with the data will be recognized and rejected by the system."}]}],"pr":"5ab9827f3449937e914e90354558f7423f65d764a6c9dea7a743d872aa29c284"}