A wedding show featuring 4D hologram technology is held during the China Hi-tech Fair in Shenzhen, Guangdong province, on Nov 16, 2016. The 4D hologram system is developed by Dream View World, a Shenzhen-based company. By simply touching the screen, users can switch the theme of their wedding to 4D virtual scenes such as primitive forest, sea world, serene castle, ocean of flowers, or soaring buildings. [Photo/IC]