The latest news and top stories on Zhang Shengwu, a 60-year-old Chinese inventor from Anhui province. Known for his remarkable self-taught engineering skills, he gained recognition for constructing home-made submarines without formal training or blueprints. He has a background in carpentry and shipping, which likely contributed to his practical expertise. His work involves designing and building functional submersibles, notably the "Big Black Fish", a two-person vessel capable of diving eight metres and remaining submerged for 30 minutes. This larger craft followed an initial prototype that earned a utility patent, showcasing his ingenuity and perseverance in pursuing his unique passion.