 In this video, I would like to concentrate on our work, vibrovis, stimulating weight, and center of graduate change in what objects in virtual reality for enhanced realism. Mantou is particularly relevant to those of you who are interested in virtual reality and healthy feedback. Sensing an object's weight and how its weight is distributed is one of the main way people understand objects in real life. In virtual reality, when people want to interact with objects in the virtual environment, they expect that the perceived weight and center of gravity of a virtual object can change just as in real environment. However, it remains a significant challenge of immersive virtual reality. If an application is to allow a further immersive experience, this aspect could be important. However, on one hand, current commercial way our system can only provide the same heavy simulation for all virtual objects, such as simple vibration feedback. On the other hand, most applications and several studies use only vibration or texture as the heavy feedback provided to users. Nevertheless, vibration alone cannot reflect where all the properties of heavy sensations people feel when holding the object because it cannot completely map other type of information like weight and inertia. So how do they perform the simulation so how the path can be seen in this picture? Then a user pick up a virtual object in virtual environment. The flow rate will inject into the balloons. As a speed of 30 millimeters per second using a 42 step model and push-out, step models were controlled by encoder. And encoder and steering gear were controlled by microcontroller ESPA2C6 for different weight and the center of gravity. The simulation schema is shown above. Different volume of liquid I inject into the balloon or simulation different virtual objects. You can see picture here. Let me summarize the whole project. First of all, I think the whole project is complete as planned and the experimental is all the asset factory. Secondly, I think this device can meet the user's expectation of feeling the change of virtual object weight and center of gravity in virtual environment. And the user experience of the mental base the device is better. In addition, I find that users have a much better user experience when they play games. Finally, the device can be used for game and to train in the future by this need for further research. Thank you for listening.