During September 20^th to 22^nd Dr. Pornchai Mongkhonvanit President of Siam University and President of GCS (Good Will, Cooperation, Service ) Thailand chapter, and the President Emeritus of International Association of University Presidents, IAUP attended the celebration and conference of 30^th International Day of Peace designated by the UN in Korea. During this event, Dr. Pornchai Mongkhonvanit was the key note speaker and the chairman for the GCS international seminar on the theme of Peace, Unity and symbiosis in the era of Globalization, while on the 21^st of September, the UN international day of peace Dr. Pornchai Mongkhonvanit was assigned to provide the designation speech of the International Peace Day. This was held at the Peace Plaza, the War Memorial of Korea.