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Zhang Shengwu, a 51yo farmer, received a Chinese government patent for a submarine he designed and built himself for around 5,000 Yuan (€670 / $760). Despite the small size of the submarine, which barely has enough room for one person, measuring six metres long and 60 cm wide, Zhang Shengwu received a patent certificate from the State Intellectual Property Office. The home-made vessel can only travel up to seven nautical miles per hour and dive to a depth of one metre. COURTESY: RT's RUPTLY video agency, NO RE-UPLOAD, NO REUSE - FOR LICENSING, PLEASE, CONTACT http://ruptly.tv RT LIVE http://rt.com/on-air Subscribe to RT! http://www.youtube.com/subscription_center?add_user=RussiaToday Like us on Facebook http://www.facebook.com/RTnews Follow us on Twitter http://twitter.com/RT_com Follow us on Instagram http://instagram.com/rt Follow us on Google+ http://plus.google.com/+RT Listen to us on Soundcloud: https://soundcloud.com/rttv RT (Russia Today) is a global news network broadcasting from Moscow and Washington studios. RT is the first news channel to break the 1 billion YouTube views benchmark.