Zou Zhe told Amon to move by following him step by step. This was because they were entering the area affected by the giant formation overseeing the border.
He told Amon he had studied this formation for a long time. He knew a crack in it so as not to trigger it. One wrong move, and the rocky terrain around the place would shift and lock them in. Fleeing from the sky was not an option since the formation would exude a strong gravitational force that pulled most illegal flyers down. Additionally, the nearby army would be notified, both from Echos and Farghous' sides. So, they would be swarmed by the authorities from the two countries.
While they moved, Amon noticed words of power marking the path they passed through, which contradicted the words of power filling most of the surroundings. Rather than a crack in the formation as Zou Zhe mentioned, it was more like they used this path to mask their presence from the formation protecting this border.
