Chinese farmer stuns world with submarine that dives 26 feet deep

Zhang Shengwu, a 60-year-old retired Chinese farmer from Anhui province, has captured global attention by building a homemade submarine named "Big Black Fish" that successfully dives 26 feet (8 meters) deep in the Fengle River. Over nearly a decade, Zhang, who has experience as a carpenter, welder, and shipping worker, pursued his dream after being inspired by a TV program in 2014. Starting with a rudimentary one-man sub that could only submerge a meter and leaked badly, he earned a national patent in 2016. Undeterred, Zhang invested further resources to develop a larger, two-seater submarine weighing five tons, equipped with reinforced welding, water tanks for ballast control, and a cockpit featuring modern controls and instrumentation. The "Big Black Fish" has garnered viral fame on Chinese social media, with footage showing the sleek black vessel smoothly diving beneath and resurfacing from the river. While experts have not yet assessed its safety or seaworthiness