Yunfei Bai works on robotics in X (formerly Google [x]). His research at X focuses on physics-based simulation (PyBullet) and deep learning for robotics. In particular, he is interested in learning robot manipulation skills using deep reinforcement learning and learning from demonstration, by leveraging simulation and VR, and transferring the learned controllers in simulations to real robots. He received a Ph.D. degree in Computer Science from Georgia Institute of Technology in 2015, under the advice of Dr. C. Karen Liu. His thesis focuses on designing algorithms for synthesizing human motion of object manipulation. He was a member of Computer Graphics Lab in Georgia Tech. He received a B.E. degree from Tsinghua University, China in 2010.