The 3D printed food is seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed shoes are seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed Leaning Tower of Pisa is seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed "robot" is seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed bicycle and elephant are seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed shoes are seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)

The 3D printed food is seen at the 2015 International Consumer Electronics Show (CES) in Las Vegas, Nevada, the United States, on Jan. 6, 2015. (Xinhua/Yin Bogu)