{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the security and effectiveness of electronic contracts?","a":"Immutable data: Every transaction in blockchain  technology generates a unique hash value, and subsequent transactions are connected to the previous transaction's hash value, forming an immutable chain structure. Therefore, any tampering with electronic contract data will cause changes to the chain structure, thus being recognized by the system."}]}],"pr":"1393c91a18b395ead7914240297b52de09f6d256380dc2ab88f80c3249a8ebd6"}