He has served as a visiting scholar or guest researcher at Yale University, Columbia University, Oxford University, the Max Planck Institute for Foreign and International Criminal Law in Germany, and a legal research officer in the Office of the Prosecutor General of the International Criminal Court. He once worked in Singapore He studied at the National University of Singapore and the University of Nottingham in the United Kingdom. He studied at the National University of Singapore and the University of Nottingham in the United Kingdom, and also studied at Harvard University, the Brookings Institution, Russian Far Eastern University, National Taiwan University, National Chengchi University, Taipei University, Central Police University, Auxiliary He gave lectures and participated in academic conferences at Jen University, Kaohsiung City University and Xuanzang University. He has lectured and participated in academic conferences at Harvard University, Brookings Institution, Far Eastern University in Russia, National Taiwan University, National Chengchi University, Taipei University in Taiwan, Central Police University in Taiwan, Fu Jen University, Kaohsiung City University and Xuanzang University.