Guoyang Pass, a naturally formed mountain pass, separates Dragon Dive State from Yangchuan State with a range of mountains stretching from east to west.
If one wishes to travel between the two states, going through Guoyang Pass is the preferred option. Otherwise, they would have to take a lengthy detour around the entire mountain range.
Guoyang Pass borders a river. Without the river that cuts through the mountains, the gradually formed stony road to its side would not exist.
Du Gang did not follow the road, but instead ventured into the dense forest, climbing the mountain.
This narrow, elongated pass cuts through four or five mountains, the shortest of which is only seven or eight hundred meters high and is situated at the entrance on the side of Dragon Dive State.
In earlier times, mountain bandits reportedly wreaked havoc here. However, as the influence of the Dragon Dive State region rose, the bandits were obliterated, ultimately erased from the course of history.
