Introduction to the Tangluo Ancient Road: Starting from Zhouzhi Luoyukou in the north and ending at Tangyukou in Yangxian County in the south, it was one of the six main transportation roads in Guanzhong area leading to Hanzhong and Sichuan in ancient times. Opened as a trunk road during the reign of Emperor Gaozu of the Han Dynasty, the ancient road crosses the Xilaojun Mountains and then enters the forest park. It passes through the Badou River and Damang River valleys, westward along the Heihe River to Houzhenzi, and then southwest along the Qiumaozigou across the Qinling Liang. Out of the park.