{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain ensure the immutability of data?","a":"Decentralization: Blockchain adopts a distributed database structure without a central node, and all nodes have equal status.  Each node has a complete copy of the ledger, and any modification requires consensus from all nodes. Therefore, it is impossible for a single entity to tamper with the data."}]}],"pr":"db7d743802437774f8cfdfcdb09423fadddd793e3c06b58215638e096ada2e93"}