A smaller version of Noah's Ark of China, a six-ton (5,443 kg) ball container built by Chinese inventor Yang Zongfu, undergoes a burning test in Yiwu, Zhejiang province, August 6, 2012. According to local media, Yang spent two years and 1.5 million RMB ($235,585) to build the four-metre diameter vessel, which has been tested capable of housing a three-person family and sufficient food for them to live in 10 months. The vessel was designed to protect people inside from external heat, water and external impact. Picture taken August 6, 2012.
A 49-year-old electric bike mechanic who identified himself only as Wu welds a component to fit onto his newly-made robot (R) at his repair shop in Shenyang, Liaoning province June 25, 2012. Wu spent over 10 days to make this nearly two-meter high robot using parts from abandoned electric bikes. The robot, which is able to walk and pump up tires by itself, is still under modification, according to local media.
Zhang Wuyi sits in his newly made multi-seater submarine at his new workshop near an artificial pool in Wuhan, Hubei province, November 14, 2012. Zhang, a 37-year-old local farmer, who is interested in scientific inventions, has independently made seven miniature submarines with several fellow engineers, one of which was sold to a businessman in Dalian at a price of 100,000 yuan ($15,855) last October. The submarines, mainly designed for harvesting aquatic products, such as sea cucumber, have a diving depth of 20-30 metres (66-98 feet), and can travel for 10 hours, local media reported.
Tian Shengying (R), a 55-year-old blacksmith, adjusts the rotor of the helicopter, in Shenyang, Liaoning province, September 21, 2012. Tian built the bottom, body, tail and rotor of the helicopter single-handedly without a detailed blueprint in just half a month after receiving a request by an unmanned aircraft research centre.
Chinese farmer Yang Youde pushes his homemade cannon near his farmland on the outskirts of Wuhan, Hubei province June 6, 2010. Yang's cannon, which is made out of a wheelbarrow, pipes and firing rockets, is used to defend his fields against property developers who wants his land. Picture taken June 6, 2010.
Sun Jifa moves a brick as he works to build his new house in Yong Ji county, Jilin province, September 25, 2012. Chinese farmer Sun, who lost his forearms in a dynamite fishing accident 32 years ago, could not afford to buy prosthesis. He spent two years guiding his two nephews to build him prosthesis from scrap metal, plastic and rubber. Over the years, Sun and his nephews have built about 300 prosthetic limbs for people in need, charging 3000 RMB ($476) each. Picture taken September 25, 2012.
Han Yuzi, 63, inventor, holds up one of his creations, a hair comb that doubles as a small hand-held musical instrument, in Guangzhou, the capital of China's Guangdong province, September 13, 2003. The instrument measures 126.2 mm in length, 48.6 mm in width and weighs 68 grams.
Farmer Wu Yulu drives his rickshaw pulled by a his self-made walking robot near his home in a village at the outskirts of Beijing January 8, 2009. This robot is the latest and largest development of hobby inventor Wu, who started to build robots in 1986, made of wire, metal, screws and nails found in rubbish sites.
Local farmer Shu Mansheng hovers above the ground in his self-designed and homemade flying device during a test flight in front of his house in Dashu village on the outskirts of Wuhan, Hubei province September 21, 2011. The round steel flying device, which cost more than 20,000 yuan ($3,135), is the fifth model made by Shu, a junior middle school graduate. It measures around 5.5 meters (18 feet) in diameter, and is powered by eight motorcycle engines. Shu managed to hover for 10 seconds at about 1 metre (3.3 feet) above ground during a recent test flight.
Ding Shilu, an automobile mechanic, carries out a test-flight for his self-made aircraft at a frozen reservoir in Shenyang, Liaoning province February 25, 2011. The aircraft which weights about 130 kg (287 lbs) and made of recycled materials including three motorbike engines and plastic cloth, cost about 2600 yuan ($395), local media reported.
Zhang Xuelin sits inside his self-made aircraft at his home before its test flight in Jinan, Shandong province, November 28, 2012. Zhang, a farmer who dropped out of primary school in his early years, spent around 2,000 yuan ($321) to build a plane around a motorcycle, using wood and plastic boards. The plane, which took 11 months to build, failed in its test flight. Picture taken November 28, 2012.
Lei Zhiqian rides a modified bicycle across the Hanjiang River, a tributary of the Yangtze River in Wuhan, Hubei province June 16, 2010. The bicycle, equipped with eight empty water containers at the bottom, was modified by Lei's instructor Li Weiguo, who hopes to put his invention into the market. Picture taken June 16, 2010.
Zhang Yali, 49, tests a giant bicycle designed and made by him and his friends outside a rented warehouse in Jilin, Jilin province December 25, 2011. The 3.2-metre-high and 5.5-metre-long three-seated giant bicycle, weighing over one tonne, cost Zhang more over 20,000 yuan (3,156 USD). Zhang spent two months making this bike as a gift for his son, a 25-year-old part-time cartoonist currently living in Shenzhen, Guangdong province. According to Zhang's family, they were planning to ride this bike from Jilin to Shenzhen, local media reported. Picture taken December 25, 2011.
Zhao Xiuguo drives a homemade model of Formula One car in Tangshan, Hebei Province, some 180km (113 miles) east of Beijing July 21, 2006. Zhao Xiuguo and his brother Zhao Xiushun built the car from scrap metal and said that they wanted to design and build the first Formula One racecar in China.