Qi Tian was not overly familiar with the situation on the border, but Luo Xia and a few others were well-informed. Generally speaking, both Tongguan Guard Station and Tongguan Left Guard Station were on the frontline. However, Tongguan Guard Station was akin to a command headquarters set up on the border by the court. With towering walls and ample resources, whether in terms of the personnel stationed or reserves of supplies, none of the other guard stations on the border could compare.