{"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":"369271697a38d4f997209c5852bcfbac73e19f109e4ab5b28a6688b8a7318b2f"}