The Nine Provinces Guardian Formation was a concept Jiang Li and Bai Hongtu had conceived long ago.
The Heavenly Demons that came from the other worlds always appeared at random locations. Although Jiang Li could easily defeat them, he first needed to be aware of their arrival and then rush to their landing spot.
The time this would take would be sufficient for the Heavenly Demons to wreak widespread havoc, resulting in millions of casualties.
To reduce casualties and gain time, they gave birth to the idea of the Nine Provinces Guardian Formation. In their vision, this formation would envelop the entire Nine Provinces. When a Heavenly Demon arrived, it would need a quarter of an hour to break through the formation. In the meantime, Jiang Li could then receive news of the attack, rush to where the formation was broken, and kill the Heavenly Demon.
However, there were two difficulties with this formation.
