Jiaxin Bai

Postdoctoral Researcher
Department of Computer Science and Engineering
Hong Kong University of Science and Technology

I am a Postdoctoral Researcher supported by the prestigious RGC Junior Research Fellow Scheme in the Department of Computer Science and Engineering at the Hong Kong University of Science and Technology, starting from July 2025.

Prior to this position, I completed my Ph.D. supported by the Hong Kong PhD Fellowship Scheme in the same department from September 2020, under the supervision of Professor Yangqiu Song. I also hold two Bachelor’s degrees in Computer Science and General Business Management from the Interdisciplinary Program Office of HKUST.

🔬 Research Focus

My research centers around the complete lifecycle of knowledge in AI systems, spanning three interconnected phases (details in selected publication):

🏗️ Phase 1: Knowledge Creation & Structuring

Building structured knowledge from raw data with automated processes that capture nuanced human intentions (ACL'23; Arxiv'24) and dynamically generate schemas without predefined constraints (Arxiv'25).

🧠 Phase 2: Complex Knowledge Reasoning

Developing novel methods for reasoning over knowledge graphs to answer complex queries and infer new information (KDD'24), including logical reasoning (NAACL'22 Findings; NeurIPS'23; KDD'23; TMLR'23), privacy preservation (KDD'24;TMLR'25), and establishing the next-generation paradigm of Agentic Neural Graph Databases (ACL'24; Data Engineering Bulletin'25).

🤖 Phase 3: Knowledge-Enhanced AI Systems

Exploring the synergy between structured knowledge and large language models (LLMs) (EMNLP'20 Findings), creating benchmarks to test robustness and comprehension abilities, and developing methods to enhance factuality (Arxiv'25) and reasoning capabilities in specialized domains (ACL'25).

🏆 Honors & Awards

🎯 RGC Junior Research Fellow Scheme (2025) • Hong Kong Research Grants Council
🎓 Hong Kong PhD Fellowship (2020) • University Grants Committee

🎯 Academic Services

Area Chair

ARR Oct 2024 → NAACL-2025
ARR Feb 2025 → ACL-2025
ARR May 2025 → EMNLP-2025

Reviewer & Program Committee Member

KDD: 2021, 2023, 2024, 2025
ACL: 2023
EMNLP: 2021, 2022
JAIR: Journal
TKDE: Journal
NLPCC: 2023
ARR: Ongoing

Interested in collaboration? Feel free to reach out for research opportunities, academic discussions, or potential partnerships.