Introduction to Hunhuaizhang Ruins: Hunhuaizhang" is the top attraction of Binggou tourism. It was a military fortress set up by Qin general Meng Tian when he led an army of 300,000 to attack the Huns in the north and regain Henan. Since then From the Qin Dynasty to the early Tang Dynasty, it lasted for 836 years and has always been an important border defense place for strategic warfare.