Xiang Li is a postdoctoral researcher at the University of Pennsylvania, collaborating with Prof. Qi Long and Prof. Weijie Su. He earned his Ph.D. from Peking University under the guidance of Prof. Zhihua Zhang. Xiang is passionate about pushing the boundaries of knowledge in his fields and is driven by a deep interest in advancing statistics and optimization research. His current research interests span several areas, including federated learning, statistical inference, stochastic approximation, online decision-making, and privacy data analysis.