He received B. A. from Yonsei University, Seoul, Korea, and his Ph. D. from the University of Chicago.

他在韩国首尔延世大学获得学士学位，在芝加哥大学获得博士学位。

youdao

He was born in Korea and has studied at Yonsei University in Korea and University of Southern California in USA.

生于韩国，先后就读于韩国延世大学和美国南加州大学。

youdao

Choi Jong-kun, an international relations professor at Seoul's Yonsei University, thinks the declaration that Pyongyang violated international law is mainly for the consumption of angry South Koreans.

VOA: standard.2009.09.11

Hwang Sang-min, a professor of psychology at Yonsei University in Seoul, argues that Korean society's strong focus on appearances having the right education, job or perceived level of success is a big factor in the high suicide rate.

ECONOMIST: A national debate about the alarmingly high suicide rate

"The point they're trying to make is the leadership is pretty stable, " said Choi Jong-kun, professor of international relations at Yonsei University in Seoul.

WSJ: North Korea Bids Farewell to Kim Jong Il

That tough stance, while worrying to some, is likely to be a kind of "pre-emptive rhetorical deterrence", according to analysts such as John Delury, a professor of International Studies at Seoul's Yonsei University.

BBC: Anxiety in South as N Korea rhetoric escalates