Aerial photo taken on March 11, 2019 shows technician Gu Heli reacting in an emergency drill on the cable car ropeway at Huangshizhai scenic area in Zhangjiajie, central China's Hunan Province. Zhangjiajie, a picturesque tourist spot in central China, is regarded by many tourists as an elysium on Earth. Its pillar-like mountain formations are prototype for Avatar's fictive diorama of hanging, mist-shrouded peaks. To secure the safety of tourists, many technicians like Gu Heli pay full attention on inspecting and safeguarding the transport infrastructures. (Xinhua/Wu Yongbing)