1984.9 ~ 1987.7 worked as a teaching assistant in the horticulture department of northeast agricultural college.
1987.9 ~ 1990.7, Department of Horticulture, Northeast Agricultural College, on-the-job study, with a master's degree in agronomy.
1990.7 ~1991.11Department of Horticulture, Northeast Agricultural College as a teaching assistant.
1991.11~1996.11used to be a lecturer in the Department of Horticulture of Northeast Agricultural College.
1996.1~ 2000.11Associate Professor, Deputy Director of Horticulture Department, Director of Vegetable Teaching and Research Section.
2000. 1 1 ~ 2005.9 Associate Professor and Deputy Director of Vegetable Department, College of Horticulture, Northeast Agricultural University.
2005.9 ~ 2008.6 Professor of Vegetable Department, College of Horticulture, Northeast Agricultural University.
Since June 2008, he has been a professor and doctoral supervisor in the Department of Vegetables, College of Horticulture, Northeast Agricultural University.