Haotian Bai

Haotian Bai

Ph.D. student at HKUST(GZ); Research Intern at rednote Interaction Lab

Stay hungry. Stay foolish. Yesterday is history, tomorrow is a mystery, today is a gift of God, which is why we call it the present.

Hi, I’m Haotian Bai (白皓天), a Ph.D. student in Artificial Intelligence at HKUST(GZ), advised by Prof. Hui Xiong (熊辉). Since October 2026, I’ve been a Research Intern at rednote’s Interaction Lab.

I work on AI companions, AI glasses, and memory. I’m interested in how experience shared in the rednote community, together with a person’s browsing, searches, and saved posts, could help them in everyday situations. My current work asks what glasses should remember from what they see and hear, and when those memories would be useful.

I previously founded HoloSoul (灵映科技), where I built and shipped an AI companion with voice interaction, an avatar, and memory across conversations. Building it has made me pay more attention to why someone would need a companion and choose to keep using it. (Business plan)

My earlier research focused on reconstructing 3D scenes and mapping the environment around a moving camera. You can find my research on the Work page and more personal reflections in Musings.

My papers have appeared at CVPR, ICCV, ECCV, and NeurIPS. I review for TPAMI, TOMM, and TIP. You can also find my projects on GitHub .

Outside work, I enjoy cooking, basketball, music, and learning about starting a business.

🔥 News

  • 2026.10: I joined rednote’s Interaction Lab as a Research Intern, working on AI glasses and memory. A few thoughts on the work.
  • 2026.04: HoloSoul won a Bronze Medal at the International Exhibition of Inventions of Geneva, recognizing its proactive, identity-contingent emotional AI companion.
  • 2025.12: HoloSoul was featured at the HKUST Innovation Tour (8th stop) in Zhuji for its emotional AI companion platform. See the event report.
  • 2025.12: HoloSoul was featured at Hong Kong Science Park for its emotional AI companion and multimodal experience in this feature article and this article.
  • 2025.11: HoloSoul earned third prize and a finals berth at the Guangzhou Sci-Tech Innovation & HKUST Million Dollar Entrepreneurship Competition per the official announcement.
  • 2025.06: HoloSoul debuted at the HKUST(GZ) InnoTech Expo, drawing investors, students, and media attention, and received a Learning Power feature.
  • 2024.11: I join the research team lead by Prof.Hui Xiong (熊辉).
  • 2023.09: I join AI Thrust, Info Hub in HKUST(GZ) as a Ph.D. student.
  • 2023.07:  🎉🎉 One paper is accepted by ICCV2023.
  • 2023.03:  🎉🎉 One paper is accepted by CVPR2023 highlight(top 2.5%).
  • 2022.07:  🎉🎉 My first paper is accepted by ECCV2022.
  • 2022.05: I join AI Thrust, Info Hub in HKUST(GZ) as a research assistant supervised by Addison Lin Wang(王林).
  • 2021.07: I join School of Data Science, CUHKSZ as a research assistant supervised by Ruimao Zhang(张瑞茂).
  • 2021.06: I graduate from Shanghai Univeristy with my bachelor’s degree in computer science and engineering.
  • 2019.09: I was selected as (1/300) Chinese undergraduate student representatives to attend the Global Grand Challenge Summit in London.
  • 2019.06: I was selected as (1/30) undergraduate student representatives to join the leadership program in The Wharton School of UPEEN.

🎖 Honors and Awards

  • 2026.04 Bronze Medal, International Exhibition of Inventions of Geneva (HoloSoul).
  • 2025.11 Third Prize & Finalist, Guangzhou Sci-Tech Innovation & HKUST Million Dollar Entrepreneurship Competition (HoloSoul).
  • 2024.08 Serve as a reviewer for Transactions on Multimedia Computing Communications and Applications (TOMM).
  • 2024.06 Serve as a reviewer for IEEE Transactions on Image Processing (TIP).
  • 2024.04 Serve as a reviewer for Transactions on Multimedia Computing Communications and Applications (TOMM).
  • 2024.03 Serve as a reviewer for IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI).
  • 2019.07 The third municipal price in the national math modeling competition.
  • 2018.10 The third municipal prize in the 2019 National College Students Extracurricular Academic Practice Competition(Alzheimer).
  • 2018.06 The third national prize in the China University program development competition.

📖 Educations

  • 2023.09 - (now), Ph.D., Hong Kong University of Science and Technology, supervised by Prof. Hui Xiong (熊辉).
  • 2017.09 - 2021.06, B.E., Shanghai University

💬 Invited Talks

  • 2022.12, The global Ph.D. talk for sharing papers accepted in ECCV 2022, AI TIME, International Science and Technology Information Center, Tsinghua University. | [video]

💻 Internships

  • 2026.10 - present, Research Intern at rednote, Interaction Lab.
    • Explore how experience shared in the rednote community and a person’s browsing, searches, and saved posts could help them through glasses, away from the phone.
    • Research memory for an ongoing stream of sights and sounds: what to keep, how to store it, and when to recall it, so the companion can help at the right moment and earn the person’s trust.
  • 2022.05 - 2023.08, research assistant at AI Thrust, Info Hub in HKUST(GZ), supervised by Prof. Addison Lin Wang (王林).
  • 2021.07 - 2022.04, research assistant at School of Data Science, CUHKSZ, supervised by Prof. Ruimao Zhang (张瑞茂).