{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology achieve the uniqueness of digital identity and privacy protection?","a":"Data immutability: Blockchain technology has the characteristic of data immutability, with each transaction record permanently stored on the blockchain. Once a user's identity information  is stored on the blockchain, it cannot be tampered with or forged by anyone, ensuring the uniqueness of the identity."}]}],"pr":"a3521c8c3e1c125647ae85aa4d6a6938eaf86350c89668d8675ad1862b39b7de"}