Around the 10th day since the spread of COVID-19 had hit Korea, Dong Hoon Lee was the first to invent a ‘Coronamap’- an online service that records the trace and information of the confirmed case on a map. At this moment Coronamap marked maximum simultaneous access of 26K, 4.4M views, and 1.4M users. Dong Hoom Lee is now running online services related to COVID-19 such as Coronamap, Maskmap, Coroname. He is also collecting and managing COVID-related data. In 2019, Dong Hoon Lee co-founded Start-Up MODAC, took part as a CTO. In 2020, he is operating Curing, an offline conference management service, and Grows-UP, a curatorial service for YouTube channel.