"In the first week we got here, we completely changed our design," said Asif Khan, from Canada, who is now starting his own business in Shenzhen, Guangdong province.

Khan is working on new molding technology that can automatically change its surface so that manufacturers can quickly and easily adjust their moldings.

The core of his design is the "PinPress", a cube, as small as a ping-pong ball, with many metal pins inserted in it.