Gu Shenwei felt that the battle unfolding not too far away from him was an illusion and had nothing to with himself. The adrenaline rush he had felt before the start of the battle was suddenly gone.
He could not be moved by the battle cries, neighing horses and the incredible amount of arrows whizzing about. After sounding the horn, it was as if he had become a bystander and was not involved in the battle at all. Soon, this feeling of being an onlooker was also replaced with a feeling that he was listening to someone else recounting a battle, and that he was only re-enacting the battle scenes in his mind.
This made him feel a little guilty, as the mounted troops facing the arrows were his soldiers and fighting for him. However, it did grant him the ability to calmly observe the battle from afar. He knew that his military counselor had won them the battle even though the mounted troops had only covered two-thirds of the distance between themselves and the enemy.