The annals Dai Nam Nhat Thong Chi by the History Department of the Nguyễn dynasty wrote about Ngu Binh Mountain as follows: In the northeast of Huong Thuy emerges an even surface serving as a screen, a first bar in front of the citadel. It was called Nui Bang (Even Mount) and renamed Ngu Binh in Gia Long's reign. Its top is flat with pine trees everywhere.