Yi Wang, Chairman of the Board of Directors and Chief Executive Officer

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Yi Wang is one of our founders, and has served as the chairman of our board of directors and our chief executive officer since the inception of our company. Prior to that, Dr. Wang served as a product director at AdChina, a leading online advertising platform in China, from April 2011 to August 2012. From July 2009 to April 2011, he served as a product manager at Google and was responsible for various key features and systems of Google Analytics and Google's cloud infrastructure. He received his bachelor's degree and master's degree in electrical engineering from Tsinghua University in 2003 and 2005, respectively, and his Ph.D. degree in computer science from Princeton University in 2009.

Zheren Hu, Director and Chief Technology Officer

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Zheren Hu is one of our founders, and has served as our director and chief technology officer since the inception of our company. He has also been in charge of our English for Adults business since April 2018. From 2010 to 2011, Mr. Hu served as an engineer at Quantcast, an AI-driven data analytics company. Mr. Hu received his bachelor's degree of engineering in computer science from Shanghai Jiao Tong University in 2006 and his master's degree of science in management information systems from the University of Arizona in 2008.

Hui Lin, Director and Chief Scientist

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Hui Lin is one of our founders, and has served as our director and chief scientist since the inception of our company. Prior to that, Dr. Lin served as a research scientist at Google from 2012 to 2013. Dr. Lin received his bachelor's degree and master's degree in electrical engineering from Tsinghua University in 2003 and in 2006, respectively, and his Ph.D. degree in electrical engineering from the University of Washington in 2011.