I Hand Over an Immortal Artifact from the Start, and the Nation Helps Me Fight a Spy War

Lu Yuan accidentally activates the [Kunlun Broken Mirror] and gains the ability to forcibly travel between the past and present for 24 hours at a time. What's more, whenever he's in the present, time in the era he transmigrates to remains completely frozen. As long as he isn't shot in the head, he instantly regenerates and can read the memories of the dead! You're trapped in a dead end, surrounded by heavy firepower! You exploit a bug to return to the present and rest for 24 hours! The national team will work out a battle plan for you.