Start 🩰 Oct. 2015~ Oct. 2020 KUMC.korea OS unit & GY unit 💉 Nov. 2020 ~ March.2021 In Jeju🍊 🇵🇭🇯🇵🇨🇳🇹🇭🇩🇪🇫🇷🇮🇹🇭🇺🇦🇹🇨🇿