{"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":"Decentralized storage: Blockchain technology adopts a decentralized network  architecture, storing electronic data on distributed nodes, thus avoiding the attacks and data tampering risks that may occur in centralized storage."}]}],"pr":"2752322576893117f8749998057bf137a4eff992a95d793d77d473c976776552"}