{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology solve the authentication problem?","a":"Data immutability: Blockchain technology has the characteristic of data immutability, where each block contains the hash value of the previous block, forming a chain structure. This makes any attempt to tamper with the data be  recognized and rejected by the system, ensuring the authenticity and credibility of the data."}]}],"pr":"0244b6880300d5dc15d90166237baff9204bf703079a88f822fd9916ada495dd"}