In a small village in China's Anhui province, a 60-year-old farmer named Zhang Shengwu has turned heads by building his own 7-meter submarine from scratch—no engineering degree or formal plans required. Inspired by a lifetime of watching boats, Zhang’s DIY sub glides through the river with surprising sophistication, proving that ingenuity isn’t confined to labs or big budgets.

Editor’s Note: This isn’t just a quirky local story—it’s a reminder that creativity and determination can spark innovation anywhere, even in unexpected places. Zhang’s submarine challenges stereotypes about who gets to be an inventor and highlights the untapped potential of everyday problem-solvers. Plus, it’s just plain cool.