1 / 4   An expo park featuring all 3D-printed objects recently opened in east China's Shanghai. /VCG Photo

2 / 4   Using three dimensional printing technology, the park has turned the imagination into reality. /VCG Photo

3 / 4   The items on display range from 3D-printed decorations to a 3D-printed bridge. /VCG Photo

4 / 4   The park uses recycled waste from steel mills, coal industry, power and chemical plants, and urban waste, as well as sand from deserts, to print everything on display. /VCG photo