I am a research scientist at Google since Jan 2013. I work on enriching and cleaning knowledge for Google knowledge graph. My research interest includes data integration, data cleaning, and knowledge base. Prior to joining Google, I worked for AT&T Labs - Research. I received my Ph.D. in Computer Science and Engineering at Univ. of Washington. Before coming to the United States, I obtained a M.S. in Computer Science at Peking University, and a B.S. in Computer Science at Nankai University in China.