Boom! Boom! Boom!
Lu Qingshan's heart was struck by a thunderclap.
The highest cultivation among the cultivators the Human Race sent to defend the passes, except for Yumen Pass, was only at the Seventh Realm.
Of course, this wasn't because the Human Race lacked manpower; after all, even at their weakest, they could still muster more than a dozen Eighth Realm cultivators.
This was a tacit agreement reached across the void between the Human Race and the Demon Race—not to deploy cultivators above the Seventh Realm in minor city passes, and similarly, the Demon Race didn't use Demon Race members above Seventh Grade when attacking these minor passes.
For both sides, cultivators or demons at this level were not easily expendable, and thus not readily deployed.
Though the Demon Race had a surplus of population, this was only true for the low-grade demons.