Zhang Wuyi, a local farmer who is interested in scientific inventions, has successfully tested his self-made miniature submarine Shuguang Hao.

A 3.6 m (12 feet) long, 1.8 m (6 feet) high, and with a maximum diving depth of 20 m (65 feet), Wuyi’s submarine can travel at a speed of 20 km per hour for 10 hours underwater and is shaped as a dolphin.

I hope to sell my submarine as a civil product at the price of about 100,000 yuan ($15,670) after safety tests, and a merchant has decided to order one in this month, he told Reuters on Monday.

Wuyi is not the only invention-enthusiast in China. Many Chinese have even made their own helicopter, cannon, robot and more, using recycled materials.

Press “Start” to view some of the top homemade gears “Made in China”.