I am a research scientist at Applied Machine Learning under Facebook AI. We are working on building the state-of-the-art AI to advance Facebook products, as well as making Facebook a better and safer place! Before joining Facebook, I was a senior researcher and research manager at the Internet Services Research Center (ISRC), Microsoft Research at Redmond, USA. My interests, in no particular order, include natural language understanding, machine learning, recommender systems and information retrieval. I graduated with a PhD in computer science from The Chinese University of Hong Kong.