China DIY submarine 1
A worker climbs up from Zhang Wuyi's newly designed unmanned submarine that captures sea cucumbers, during a test operation at an artificial pool near a shipyard in Wuhan, Hubei province. Zhang has made eight miniature submarines with several fellow engineers  Reuters
China DIY submarine 2
Zhang Wuyi looks up as he squats under a suction pipe of his new submarine that captures sea cucumbers. His submarines are mainly designed for harvesting aquatic products Reuters
China DIY submarine 3
Zhang sits in his double-seater submarine during a test operation at an artificial pool near a shipyard in Wuhan, Hubei province. Zhang's submarines have a diving depths of 20-30m, and can travel for 10 hours Reuters
China DIY submarine 4
Zhang sits in his newly made multi-seater submarine at his new workshop. One of his submarines was recently sold to a businessman in Dalian, Liaoning Province, China, at a price of 100,000 yuan (£10,400, $15,900)  Reuters
China DIY submarine 5
A worker paints a single-seater submarine designed by Zhang and his fellow engineers. Zhang, a farmer, is interested in scientific inventions Reuters
China DIY submarines 6
A worker polishes the surface of an unfinished miniature submarine at a Zhang's workshop in Qingling village, on the outskirts of Wuhan, capital of central China's Hubei province. This home-made miniature submarine – Shuguang Hao – is 3.6m long, 1.8m high, has a maximum diving depth of 20m, and can travel at 20kmph for 10 hours underwater Jason Lee/Reuters
China DIY submarine 7
Tao Xiangli stands on his homemade submarine in a courtyard in Beijing. The amateur inventor says his submarine is made from old oil barrels, but is fully functional with a periscope, depth control tanks, electric motors and two propellers Reinhard Krause/ Reuters
China DIY Submarine 8
Tan Yong finishes diving his home-made submarine at a lake in Dangjiangkou, Hubei province. The characters translate into the name of the submarine, 'Xiyangyang' Reuters
China DIY submarine 9
Tan, a 44-year-old farmer, pulls down a lid of his home-made submarine at a lake in Dangjiangkou. Tan spent five months building the submarine Reuters
China DIY submarine 10
Tan (R) prepares to operate his homemade submarine at a lake in Dangjiangkou, Hubei province. The submarine weights more than 1,000kg, and reached a depth of around 10m during its test drive Reuters
China