Yanmen Pass, the foremost of the Nine Great Fortresses of China, has guarded the Chinese nation for millennia. From its establishment by King Wuling of Zhao during the Warring States Period to the Han Dynasty's campaign against the Xiongnu, the Tang Dynasty's defense against the Turks, the Song Dynasty's resistance against the Liao and Jin dynasties, and the Ming Dynasty's defense against the Mongols, this place has witnessed countless battles. It's a true epitome of Chinese frontier culture. Here, I even imagined the "bloody battle of Yanmen Pass" in the story of the Yang Family Generals. It felt as if I were witnessing major historical events like Wang Zhaojun's expedition to the frontier and the abduction of Emperor Qinzong of Song. And then there were the footsteps of famous generals like Li Mu, Meng Tian, Wei Qing, and Huo Qubing, who garrisoned or fought here. It was truly awe-inspiring.