The Tsinghua Southeast Asia Center (Tsinghua SEA) hosted a mini online workshop titled “Smart Tech, Big Impact: AI for a Sustainable Future” as a preview to the upcoming Happy Digital X 3.0 (HDX 3.0) program. Designed as an interactive learning session, the event introduced participants to the transformative power of Artificial Intelligence (AI) in addressing global sustainability challenges. The workshop also offered a glimpse into the experiential format of the full HDX program.