65438-0996 was invited as a visiting researcher for half a year in the Discrete Structure Project of Mathematics (SFB343) in Germany. Advanced Algebra, a textbook compiled in cooperation with Professor Chen Zhaomu, is the main content of 199 1 winning the first prize of teaching achievement in Fujian Province. Scientific research papers won 1997 Excellent Paper Award of Fujian Mathematical Society, 1997 Second Prize of Excellent Scientific Papers of Fujian Province (Provincial Association for Science and Technology, Provincial Personnel Department), First Prize of Fourth Excellent Scientific Papers of Xiamen City in 2000 (Municipal Association for Science and Technology, Municipal Personnel Bureau), Second Prize of Fifth Excellent Scientific Papers of Fujian Province in 2000 (Provincial Association for Science and Technology, Provincial Science and Technology Department) The independently completed scientific research project "hammock decomposition and Nazarova-Roiter algorithm and Zavadskij algorithm" was appraised as the international advanced level by experts organized by Fujian Science and Technology Commission, and won the second prize of 200 1 Scientific Progress Award in Fujian Province. 1998 won the Qingyuan Award of Xiamen University, and 200 1 won the Kyushu Award of Xiamen University. Seven graduate students have been trained. At present, there are three doctoral students and four graduate students.