{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of blockchain?","a":"Immutable: Each block contains the hash value of the previous block, forming a chain structure. Once the data in a block is altered, it will cause the hash value of subsequent blocks to change, rendering the entire chain invalid. Therefore, it is virtually impossible to tamper with  the blockchain."}]}],"pr":"dfcce38da036c85beb9b0e75f7aa12a337a38ca019f96ff0ff8a0685ba745469"}