They could also control their direction and timing of advancements briefly.
The Fire Emperor was now leveraging his combat power to aggressively push forward. He could even double the size of his army within a short time, an action that invokes great fear and appears unsolvable. Obviously, human reproductive abilities could never achieve this. If this continued, they would degrade in their desperation and frequent wars, although it was only minor scuffles in Beijing— mere practices for an inevitable large-scale battle. Many things would change after this battle, so they needed to shorten the preparation time for the real war as much as possible.