Visitors wearing virtual reality (VR) glasses watch a film at the ongoing China Hi-Tech Fair in Shenzhen on Thursday. A chip installed in the glasses headset helps sense the motions of the wearer, allowing for interaction between the body and a digital situation. According to Essence Securities, venture capital had invested more than US$800 million in VR device development in China by the end of 2014. (Special reports on China Hi-Tech Fair on P2, 3)Xinhua