A farmer who was annoyed after Russians sold China expensive military equipment more than twenty years ago has spent his life savings building his own submarine . Du Xiutang put 300,000 yuan ( £32,310 ) towards the project and asked friends and family to donate anything they could . The 53-year-old , from Yulin , China , still needs 300,000 yuan to complete the submarine , which has already taken nearly seven months to build , People 's Daily Online reported . A farmer is building a submarine by hand after investing his life savings in the project . Above , the submarine after seven months of work . The self-taught former miner has finished building an escape pod and managed to install a power source . He even invented a hydraulic drainage and dual propeller system , which has been patented nationally . He is awaiting a periscope - but hopes he will be able to put the sub in the water this summer . Mr Du , who has had a life-long interest in mechanical design , said : 'When Russia sold China a retired submarine at a high price in 1992 I thought the Chinese people must make their own submarines . 'The most advanced submarines in the world can not always be made by others . These thoughts motivated me all these years to succeed . ' Some of the money has been provided by his son , who works in the welding factory where the submarine is stored . Du Xiutang ( left ; right with submarine ) put 300,000 yuan ( £32,310 ) towards the project and asked friends and family to donate anything they could . The self-taught former miner has finished building an escape pod and managed to install a power source . He even invented a hydraulic drainage and dual propeller system , which has been patented nationally . Professional researchers and engineers are stunned that Mr Du developed the submarine . Here are its specifications : . Mr Du added that he was determined to get more money and would not stop . He said : 'In order to take this project further this is the only option . ' I am looking for a business partner who has strong economic credentials and who has a sincere willingness to work in the defence industry . 'If we give up at this halfway point then all that hard work will have been for nothing . I am riding on the back of a tiger at this point . I just can ’ t get off . ' Professional researchers and engineers are stunned that Mr Du developed the submarine .
Du Xiutang , from Yulin , also asked friends and family to donate money . 53-year-old started project last August and invented dual propeller system . Former miner is now looking for other investors so he can continue .