Combined photo taken on March 31, 2015 shows Yu Lingyun and his father standing in front of a transformer (upper) and Yu cutting materials at his workshop, in Hengyang county, Central China's Hunan province. [Photo/Xinhua]

Yu Lingyun, born in 1991, finished his high school and became a welder. Attracted by the movie "Transformers", he decided to make one of his own. By persuading his father, a carpenter, to start the business with him, the father and son made four two-meter-high transformers by using abandoned vehicle materials at a shabby factory in one year's time. A display of transformers they made in Changsha helped them attract buyers. Right now, they have recruited ten more local farmers and wanted to improve the technology of their products.