In 2014, Zhang saw a person build a submarine through a TV program, this inspired him to build one by himself. Despite his family's concerns over the cost and risk, Zhang insisted on building his own ...

Zhang Shengwu and his submarine, "Big Black Fish". [Photo/CCTV News] Zhang Shengwu, a 60-year-old farmer from Maanshan, Anhui province, successfully built a submarine by himself, which has drawn ...