Extreme engineering......
Workers build a footpath around the vertiginous slopes of Shifou Mountain in China
Thousands of metres up the vertiginous slopes of Shifou Mountain in Hunan Province, China, a team of workers, operating with hardly any safety measures, are building a footpath
The workers are building a plank road on the side of the mountain that, once it is finished, will stretch for 3km (9843 ft) and be China's longest sightseeing footpath
Yu Ji takes charge of the most dangerous part of the project -
drilling the holes to set up pipes to support the footpath