BEIJING — On 27 January 2021, Giovanna Tinetti (University College London/UCL Centre for Space Exo-chemistry Data at Harwell) gave an online seminar on the Atmospheric Remote-sensing Infrared Exoplanet Large-survey (Ariel) mission of the European Space Agency. Prof. Tinetti's lecture represented the ninth webinar of the ISSI-BJ "On Things to Come" series that addresses ongoing as well as future space missions by inviting renowned scientists from different countries, institutes, and space agencies.