{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of blockchain?","a":"Immutable data: Each block contains the hash value of the previous block,  forming a chain structure. Once the data in a block is changed, it will cause the hash value of the subsequent blocks to change, rendering the entire chain invalid. Therefore, to tamper with the data on the blockchain, one needs to tamper with all related blocks simultaneously without being detected during the tampering process."}]}],"pr":"ea93c7849dc383703d6ab32aa28d41f64882f1cfd01579531229ca6270c3b176"}