As a former special tactics analyst, Ji Zi's nerves were like a tight tightrope, and he did not dare to relax at all. The instinct to see all directions and listen to all directions is engraved in his bones - even if he is no longer part of the military, even if he takes over the job of tracking the "Echo" organization just to exchange for a mouthful of clean drinking water and two packs of compressed biscuits.