Hangu Pass to Henan, I do not know whether Hangu Pass is feasible, Hangu Pass has a special significance in the history of Chinese military culture. Military and political, "Emperor Qin Xiaogong's strong letter, support Yongzhou's land, the monarchs and ministers stick to peep around the room, sweeping the world, covering the whole world, including the meaning of the four seas, and the heart of annexing the eight wastes. " Lao Tzu wrote a 5,000-word "Tao Te Jing" here, which has been influencing the hearts and minds of the Chinese people for more than 2,000 years. One day earlier, we came from Xiangyang and passed through the Laoshan Tunnel in Mangmang Qinling Mountains. On the 8th, we visited Hangu Pass in the scorching sun.