Jiang Changgen works on a helicopter at his house in a countryside of Dexing City, central China's Jiangxi Province, Aug. 19, 2014. Jiang Changgen, 52, an ophthalmologist serving in some rural areas of central China, is a helicopter enthusiast who has been working on a homemade helicopter for some 2 years. The assembled copter, powered by 4.0-liter V8 engine, is 4-meter long and weighs as much as one ton. There is still some way from taking off the ground although Jiang has overcame lots of difficulties for his dream.[Photo/Xinhua]