An ambitious Chinese startup wants to know everything about your body

"This smart mirror isn't very smart," says Jun Wang, standing in front of a full-length mirror wearing designer jeans ripped at the knees. "It's just a camera and a mirror," he says, looking mildly distressed--or as distressed as possible for a man whose face is perpetually unperturbed. "What I want is a mirror that does a 3-D scan of me here," he says, using his hands to trace the contour of his thighs, "and here." Wang indicates his belly, which is lean. "We want an exact 3-D figure of you: the fat, the muscle--your entire body shape, plus facial recognition, and what's going on with your skin." He points to the top right area of the mirror.