Prof. Cha was invited as a speaker to the "2020 Annual Meeting of Korean Society for Stem Cell Research (KSSCR)" held on 13-14 August 2020 at Convention Center of SWISS Grand Hotel, Seoul, Korea.

He gave a talk entitled "GMP-compliant manufacture of stem cell spheroids for bone tissue regeneration and establishment of their quality control standards", which was about the overall research achievement from the research project supported by Korea Centers for Disease Control and Prevention (KCDC).