{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the Proof of History mechanism work in blockchain?","a":"Node time synchronization: All nodes in the network need to synchronize their local times to ensure a consistent understanding of time across all nodes. This can be  achieved by introducing a global time synchronization mechanism, such as using atomic clocks or Network Time Protocol (NTP)."}]}],"pr":"80b06a3704f4c1a28b71749b59ce4a056d48c6d8d8b32cac25f6c9d3fdeb986e"}