3D-printed houses built in Shanghai GMT 00:39 2014 Monday, 14 April Last Updated: 09:40:38 GMT Beijing - XINHUA The inventor of 3D-printed house Ma Yihe shows a model of a 3D-printed house in Shanghai, east China, April 12, 2014. Ten houses have been built of construction waste using a 3D printing technology in 24 hours in Shanghai.