From June 28 to June 30, the alumni of Class 90-311, Class 90-321 and Class 90-341 of the College collectively returned to school and sounded the 30th anniversary of the graduation of Class 90 alumni.

During the period, the college held a teachers-student seminar, organized alumni to visit the ship museum of the school, the representative laboratories of the Power School and the Nuclear School, carried out campus walking and the establishment of alumni memorial tree and other activities.