Li Yubin, 38 years old, is head of a team at a branch of China Railway Company. The team is responsible for the safety of the Yangliandi Railway Bridge, including the steel rail, the lock and the frame. To check the bridge, he needs to sit on a swing hung on the bridge. /Xinhua Photo

The bridge, 47 meters in height and 172.5 meters in length, is located in a valley in central China's Henan Province. The extreme cold weather and strong wind not only wreak havoc on the bridge, but also make the worker's job difficult. /Xinhua Photo

Yangliandi bridge is the highest bridge on the Longhai railway, which is a major east–west railway in China. The bridge was named after a worker who died while building the bridge. /Xinhua Photo