The upshot of Wang’s creative fervor is the GD01, which Unitree bills as the world’s first mass-produced, transformable mecha robot. Standing 9 ft. tall and weighing half a ton, it can transport a pilot in its torso-mounted cockpit, walk on either two legs or four, and wield fists powerful enough to knock down walls. Heavy-duty mechanical hinges connect titanium-alloy limbs to a protective casing of carbon fiber, enabling smooth, deliberate strides on brutish red legs.