4. 2025.10.25 : Invited speaker for the 26th Joint Seminar of The Kyushu Branch of The CSJ (Chemical Society of Japan) and Busan Branch of the KCS ( Korean Chemical Society)
3. 2025.09.17 : Keynote speaker for the 14th Engineering International Conference (EIC)
2. 2024.10.29 : Keynote speaker for the 9th International Conference on Energy, Environment, Epidemiology and Information System (ICENIS) Link
1. 2020.11.29 : Invited to be a speaker from the Indonesian embassy in South Korea with the theme “Prospects of the Electric Vehicle Industry in Indonesia” Link