Zhi’ang Sun, senior engineer of professor level . He has been engaged in the research and development of special alumina powder materials since 1982. In 1990, he established the Special Ceramics Research Office of Zhengzhou Light Metal Research Institute and served as the director of the office until 2000. He used to be the chief engineer of China Great Wall Aluminum Co., Ltd and Henan Changxing Industrial Co., Ltd. Now he is the expert of China Aluminum Corporation and the department of science and technology  of Henan Province and Fujian Province.