I am a researcher and engineer with rich experience in information retrieval, data mining and machine learning. Now, I am a Principal Researcher and Research Manager at Microsoft Research with research interests in AI for finance, AI for logistics, deep learning, multi-agent reinforcement learning, computational advertising, and a variety of machine learning applications. Prior to that, I was a Senior Scientist in Yidian Inc., a startup company in China, where I have been working on recommendation and search problems. I also used to work at Yahoo! Labs and did a lot of studies on content optimization and personalization for Yahoo!'s key content modules as well as local content search and recommendation for Yahoo!'s local services.