{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security of blockchain technology be ensured?","a":"Immutability: Each block contains the hash value of the previous block, forming a chain-like structure. Once data is recorded on the blockchain, it is difficult to tamper with, ensuring the integrity and credibility  of the data."}]}],"pr":"28d821d7107fdacde9394e8ee350331f606f6a03ba4bce9c8c936777ffc5ca74"}