{"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 changed, it will cause  the hash value of the subsequent blocks to change, thereby rendering the entire chain ineffective. Therefore, it is virtually impossible to tamper with the blockchain."}]}],"pr":"44eec8a77729cc95b906c20e2881a0976bec30cb117e8575f0f392e161d3859e"}