{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the concurrent Merkle tree in blockchain ensure data security and immutability?","a":"Concurrent Processing: The concurrent Merkle tree in blockchain  systems allows multiple nodes to conduct transactions and validate simultaneously."}]}],"pr":"56c63dabff9914350fd14d76c936276c90a650a306fcf55b4eba61fb390d4973"}