Zhang Wuyi sits in his newly made multi-seater submarine at his new workshop in Wuhan, China. Zhang, a local farmer, has made seven miniature submarines with several fellow engineers, one of which was sold to a businessman for $15,855. The submarines, mainly designed for harvesting aquatic products, such as sea cucumber, have a diving depth of 20-30 metres.
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Photograph: Darley Shen/Reuters