My research interest lies broadly in the areas of data mining, machine learning and statistics. My recent research focuses on trustworthy artificial intelligence (AI), which includes privacy, interpretability, security, robustness, and fairness of modern machine learning models, especially, deep neural networks. I am also an expert in federated learning, graph based machine learning, and scalable data mining on large graphs. Many of my previous research outcomes have been successfully deployed as services and products of Huawei Cloud. For example, a personalized federated learning system was deployed as a core service on tens of millions of smart phones running Harmony OS.