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Mr. Cheung joined AXT as vice president corporate controller and promoted to chief financial officer in May 2004. From February 2001 to April 2004 Mr. Cheung was corporate controller of interWAVE Communications International Ltd. (now Alvarion Ltd.) a publicly traded manufacturer of wireless voice and data communications systems. From 2000 to 2001 Mr. Cheung was senior finance manager of Yahoo! Inc. a global Internet products and services provider. Mr. Cheung spent more than eight years from 1991 to 1999 in public accounting with KPMG and Deloitte & Touche and served as senior manager of Deloitte's San Francisco office from 1997 to 1999. From 1999 to 2000 Mr. Cheung served on the Board of Directors of the Hong Kong Association of Northern California. Mr. Cheung is a California certified public accountant and a member of the AICPA California Society of CPAs and the Financial Executives International. In May 2005 Mr. Cheung was certified as director of corporate governance by UCLA's Anderson School of Management. Mr. Cheung holds a B.A. in Economics/Business from UCLA. | 