 Hi, my name is Yiming, I'm a Ph.D. student from Xi'an Jiao Tong University. This is my research in device feedback immersive head-mounted displays for distance perception during teleoperation of unmanned ground vehicles. Thanks to Professor Liang and all co-authors for help. Okay, let's have a brief introduction. Head-mounted displays have been used to provide an immersive front-person view in real time for manipulating remotely controlled unmanned ground vehicles. Distance perception for real-time teleoperation has been studied to improve user experience and task efficiency. One common way for preserving distance information is to provide video distance indicators on the screen. However, these actual visual elements take up screen space, which is often limited in HMD. The second way to use sound feedback, but this approach is not as accessible and accurate as visual elements. These issues could be addressed with a real-time feedback system for RPVOGV using tactile or off-screen visual feedback. Then we designed a prototype. We used point monitors and LED strips to provide distance information, which is captured by the distance sensors attached on a UGV. User gets information via the stimulation of vibration and off-screen LED lighting. We conduct a user study to evaluate the two feedbacks and their combination. Users were required to remotely control the UGV to pass through these experimental sites and we measured objective and subjective data. Results show that the additional sensory information allows users to move the UGV in a more precise manner and lead to a more positive experience. So both Light Video and Vibral Tactile feedback are helpful. Light Video is easier to get a customer to use. Well, Vibral Tactile feedback seems to provide higher accuracy, is more exciting and normal to use and is more resistant to interference under complex driving conditions. In short, N Divide's feedback using Vibral Tactile and LED lights is a simple, efficient and low-cost approach to provide precise distance information for UGVs controlled via an HMD in real-time. Thank you. Any questions?