When you stand on the observation deck at the top of Mount Yela, you will see the panoramic view of the Nu River 72 turn. Here you overlook the mountain, and the winding road is tied up in the mountains in a solid shape one by one, which is really impressive. The "Nujiang 72 turn" is a road in Basu County, Qamdo District, Tibet Autonomous Region, and is also located in the Qamdo Bangda to Basu District on the southern Sichuan-Tibet line. The Nujiang 72 turn is not the longest downhill on the Sichuan-Tibet line, but the steepest downhill on the Sichuan-Tibet line. From the mountain pass (4658 meters above sea level) to the Nu River (2740 meters above sea level), it is more than 40 kilometers steep. It is generally called "Nujiang 72 turn", also known as "99 turns", also said to be "108 turns", but when you visit the scene, you find it 108 turns? It is the famous "devil section" in the country, and it is a miracle of China's highway!