To celebrate Teacher’s Day, our TCR-TIL Lab prepared a heartfelt surprise

for Professor Yongjoon Lee.

Since Professor Lee was on duty the day before, we decorated his office in advance —

hoping to make him smile when he returned. ✨

When he arrived and saw the decorations, he sent a warm thank-you message through Slack,

which made everyone’s morning brighter. 💬

Later that day, we prepared a second surprise with a cake and handwritten letters,

visiting his office once more to express our gratitude in person. 🎂💌

Professor Lee looked genuinely happy —

and seeing his smile made it all worthwhile.

Happy Teacher’s Day, Professor Lee!
Thank you for your constant guidance, support, and inspiration. 🌱