![Zhang Wuyi waves after completing the test dive of his homemade submarine in Wuhan, central China's Hubei province, May 6, 2012 [Mini-submarine]](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikgW4xP6uFpv98elUoPk5h5z10AcjPS1x-mR5bzst_PD3MYsNU_4QKP2bukqqUpUKxbnVg2sF_uCmsvUCqqz-qCOXD5rNR0nBa7bPGRFsQPpFGYlW21MB43puq95Ioxl10MY7H-Q/s144/minisub.jpg)
In front of the media and members of the public, 37-year-old former textile worker Zhang Wuyi piloted his one-seat sub to the bottom of an artificial pool 4.5 meters deep, where he operated mechanical arms fitted to the vessel to pick up tools scattered on the pool's bed.
Zhang said he has made and sold three such submarines, which can submerge to a maximum depth of 100 meters and travel 6.5 miles per hour for up to 10 hours.
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