Chongde Lin is a Professor of the Faculty of Psychology, at Beijing Normal University. After graduating from Beijing Normal University (BNU) in 1965 with a degree in psychology, he worked in elementary and middle schools for 13 years (1965-1978), serving as a school leader and teaching several subjects (including mathematics). He received his PhD degree at BNU in 1984. He has been a teacher at BNU since May 1980. He was promoted to be a full professor in June 1986 and became a PhD tutor in February 1990. From May 1985 to December 1999, he served as deputy director and director of the Institute of Developmental Psychology at Beijing Normal University.Over the past 40 years, he has conducted a number of studies on intelligence promotion around the cognitive development of children and adolescents. These studies have strongly contributed to the basic education reform in China, improved the quality of education, and promoted a major breakthrough in the field of thinking theory. The theory of "the Triangular Pyramid Structure of Thinking" is one of them, and the related paper Multiple Intelligence and the Structure of Thinking was published in the international journal Theory & Psychology.