Yanzhu changed out of her disguise, headed west, and hummed a little tune—"The King Has Summoned Me to Patrol the Mountains"—while slowly making her way down the mountain under the watchful eye of a Shadow Spirit.
The "full coverage" of the Shadow Spirit refers to a situation where the Special Operations Team is capable of monitoring all Shadow Spirit activity, leaving nothing hidden. Under this level of surveillance, everything is visible, and all things remain under the watchful eye of the Special Operations Team.
"And here I was, going to send you off to the Special Operations Bureau. Once you wake up, you can go say hello to them yourself. Threatening me? You moron, try that in your next life."
Chapter 25