{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology improve the security and credibility of contract transactions?","a":"Immutability of data: Each blockchain 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, making it difficult to tamper with the data. This feature ensures that the  integrity of the data stored on the blockchain is maintained, increasing the credibility of the transactions."}]}],"pr":"506beca0ec737230d1d24c96aa03448c4449c49b54f11f8093d656a4f68bfb8a"}