2. As a very important pass on the Great Wall of Wan Li, China, Yanmenguan has a reputation of unparalleled three passes, and the nine stops honor the first pass, which shows its strategic importance.
3. As early as in Lu's Spring and Autumn Annals, there are nine blockages in the world, and Gouzhu Mountain in Luliang Mountain where Yanmenguan is located is one of them. More importantly, there is a saying that Lu Long, Hu Fei and Yanmen are the best in the world.
4. As an ancient military fortress, Yanmenguan has a long history, dangerous terrain, complete system, important position and frequent wars, ranking first in China's famous pass.