A 3D printing machine prints a vase at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A 3D printing machine prints a castle model at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A technology company founder shows a photo made with 3D technology at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

Workers take 3D photos at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A fan impeller printed by a 3D printing machine is shown at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A 3D printing machine prints a castle model at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A 3D printing machine prints a fan impeller at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)

A technology company founder shows a head sculpture of himself made by a 3D printing machine at the 3D Printing Demonstration Base in Dalian, northeast China's Liaoning Province, Dec. 30, 2015. A 3D Printing Demonstration Base opened here on Wednesday. (Xinhua/Pu Feng)