Introduction to Seventy-two Bends: Liangfengya - Seventy-two Bends is a section of National Highway 210 in Guizhou. The altitude difference is 600 meters within a distance of more than ten kilometers. It is a famous "devil's road section" in the country. This section of highway was originally built as National Highway 210 (formerly Sichuan-Guizhou Highway) in the 1930s. It designed a zigzag ramp to allow cars to climb and descend smoothly. As a result, the "72 bends" road wonder was left in the section from Liangfengya to Xinzhan.