He has been invited to speak at various academic and policy institutions, including the Council on Foreign Relations (CFR), Harvard Kennedy School, the U.S. Congress, Stanford University, the RAND Corporation, the University of Pennsylvania, the U.S. Indo-Pacific Command, the Hudson Institute, the Asia Society, the German Marshall Fund, the Stimson Center, and the National Assembly.

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He delivered a nationwide television lecture, the JTBC "Distinguished Lecture" (차이나는 클라스). He is the author of the bestseller titled 'The U.S.-China Competition: Who Will Rule the World?' with the ISBN: 979-11-6416-009-9.

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He argued that the era of South Korea riding two boats in the superpower rivalry might be coming to an end, in an era marked by U.S.-China competition, contrary to the prevailing belief at that time. He believes that we are still in the 'early stage' of the U.S.-China rivalry, and the next five years will be pivotal. Looking ahead, he thinks that the role of a political leader becomes even more salient than ever, and that 'not making mistakes' will become as important as making the right choices.

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He is currently writing a book, "100-Year Competition Between the U.S. and China: China's Rise and America's Response," set to be published in 2024.

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His interviews & comments appeared at New York Times, BBC, Bloomberg, CNN, Barron’s, Los Angeles Times, PBS NewsHour, Nikkei Asia, South China Morning Post, Japan Times, JoongAng, and Straits Times. 

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Areas of expertise: China, North Korea, and South Korea, International Relations of East Asia.​​