ソン・セン
Another member of the Paris student group was Ieng Sary, a Chinese-Khmer from South Vietnam. He attended the elite Lycée Sisowath in Phnom Penh before beginning courses in commerce and politics at the Paris Institute of Political Science (more widely known as Sciences Po) in France. Khieu Samphan specialized in economics and politics during his time in Paris. Hou Yuon studied economics and law; Son Sen studied education and literature; and Hu Nim studied law.