Yuan Sui

I am a PhD candidate at the School of Computing (SoC), National University of Singapore (NUS) , supervised by Prof. Byran Hooi. Previously, I have worked as a research intern at Microsoft Research Asia, Dartmouth College, and ICT, Chinese Academy of Sciences. My current research focuses on (1) trustworthiness of large language models (llms); (2) llm reasoning (in specialized fields, graphs, tables, etc.); and (3) causal inference. If you are also passionate about these topics, feel free to connect!

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News

  • (2025.06): Earned the Excellent Reviewer award (top 10-20%) at KDD'25 (Feb Cycle)!
  • (2025.05): Three papers accepted by ACL'25! Check the papers FiDeLiS, OKGQA, and InjDefender!
  • (2025.04): Start my internship @ Tencent AI !
  • (2025.03): Will present two papers @ ICLR, 2025, BuildingTrust Workshop in Singapore!
  • (2025.02): Invited as a reviewer for NeurIPS'25 & ICML'25!
  • (2025.01): One paper accepted by WWW'25!
  • (2024.12): Passed PhD Qualifying Exam (PQE)! Thanks to my advisor and all the examiners!
  • (2024.12): Earned the Excellent Reviewer award (top 10-20%) at KDD'25 (Augest Cycle)!
  • (2024.11): One paper accepted by KDD'25! Congrats to Yufei!
  • (2024.09): One paper accepted by EMNLP'24!
  • (2024.08): Invited as a reviewer for KDD'24 & ICLR'25!
  • (2024.04): Invited as a reviewer for NeurIPS'24!
  • (2023.10): One paper accepted by WSDM'24! See Microsoft Research Blog of our work!
  • (2023.08): Began my Ph.D. journey @ NUS with a research scholarship!
  • (2023.03): Contributed to Excel Copilot for enhanced data insights!
  • (2022.08): Joined Microsoft Research Asia, DKI Group as a research intern!
  • (2022.06): Joined Dartmouth's Minds, Machines and Society Lab as a research intern!
  • (2022.05): One paper accepted by KBS (journal)!
  • (2022.03): One paper accepted by IJCNN'22 (oral)!
  • (2022.02): Joined ICT, Chinese Academy of Sciences, VIPL Group, as a research intern!

Publications (selected, * refers to equal contribution)
Meta-Reasoner: Dynamic Guidance for Optimized Inference-time Reasoning in Large Language Models
Yuan Sui, Yufei He, Tri Cao, Simeng Han, Bryan Hooi
Preprint, 2025 
arXiv / code
This paper introduce Meta-Reasoner, a framework that dynamically optimizes inference-time reasoning by enabling LLMs to "think about how to think".
Can Knowledge Graphs Make Large Language Models More Trustworthy? An Empirical Study over Open-ended Question Answering
Yuan Sui, Yufei He, Zifeng Ding, Bryan Hooi
ACL, 2025 
arXiv / code
This paper introduces OKGQA, a benchmark for evaluating Knowledge Graph-enhanced LLMs in open-ended question answering, focusing on reducing hallucinations and improving reasoning.
FiDeLiS: Faithful Reasoning in Large Language Model for Knowledge Graph Question Answering
Yuan Sui, Yufei He, Nian Liu, Xiaoxin He, Kun Wang, Bryan Hooi
ACL, 2025 
arXiv / code
This paper presents FiDeLiS, a method combining knowledge graphs and LLMs to enhance reasoning efficiency and reduce hallucinations in downstream QA tasks.
Can Indirect Prompt Injection Attacks Be Detected and Removed?
Yulin Chen*, Haoran Li*, Yuan Sui, Yufei He, Yue Liu, Yangqiu Song, Bryan Hooi
ACL, 2025 
arXiv
This paper investigates detecting and removing indirect prompt injection attacks on LLMs.
UniGraph2: Learning a Unified Embedding Space to Bind Multimodal Graphs
Yufei He, Yuan Sui, Xiaoxin He, Yue Liu, Yifei Sun, Bryan Hooi
WWW, 2025 (oral)
arXiv / code
This paper introduces UniGraph2, a foundation model that unifies multimodal information and graph structures for effective representation learning on multimodal graphs.
UniGraph: Learning a Unified Cross‑Domain Foundation Model for Text‑Attributed Graphs
Yufei He, Yuan Sui, Xiaoxin He, Bryan Hooi
KDD, 2025 
arXiv / code
This paper introduces UniGraph, a framework for cross-domain graph learning using Text-Attributed Graphs (TAGs) and a proposed pre-training algorithm for effective zero-shot and few-shot learning.
TAP4LLM: Table Provider on Sampling, Augmenting, and Packing Semi-structured Data for Large Language Model Reasoning
Yuan Sui*, Jiaru Zou*, Mengyu Zhou, Xinyi He, Lun Du, Shi Han, Dongmei Zhang
EMNLP, 2024 
arXiv / code / poster / slide
TAP4LLM presents a versatile pre-processor suite for leveraging LLMs in table-based tasks effectively.
Table meets LLM: Can Large Language Models Understand Structured Table Data? A Benchmark and Empirical Study
Yuan Sui, Mengyu Zhou, Mingjie Zhou, Shi Han and Dongmei Zhang
WSDM, 2024
arXiv / code / blog / poster / slide
This paper releases SUC benchmark along with comprehensive empirical studies to evaluate and detect the structural understanding capabilities of LLMs on table data.
Intelligent Predictive Maintenance of Hydraulic Systems based on Virtual Knowledge Graph
Wei Yan, Yu Shi, Zengyan Ji, Yuan Sui, Zhenzhen Tian, Wanjing Wang, Qiushi Cao
Engineering Applications of Artificial Intelligence,  2023 (IF=8)
This paper proposes a virtual knowledge graph for the digital modeling and intelligent predicate maintenance of hydraulic systems in manufacturing.
Causality-aware Enhanced Model for Multi-hop Question Answering over Knowledge Graphs
Yuan Sui, Shanshan Feng, Huaxiang Zhang, Jian Cao, Liang Hu, Nengjun Zhu
Knowledge-Based Systems (KBS), 2022 (IF=8.139)
This paper propose CF-KGQA to improve KGQA tasks by address spurious relations through causal interference.
Trigger-GNN: A Trigger-Based Graph Neural Network for Nested Named Entity Recognition
Yuan Sui, Fanyang Bu, Yingting Hu, Wei Yan, Liang Zhang
IJCNN, 2022 (oral)
Trigger-GNN proposes entity triggers to improve the nested NER task.
Academic Service

Teaching

  • 2024/2025 semester 1, Knowledge Discovery and Data Mining (CS54225/CS5425)
  • 2024 Summer, Summer Research Program Mentorship (CP2107, Odyssey)
  • 2025 Summer, Summer Research Program Mentorship (CP2107, Odyssey)

Thanks Jon Barron for this amazing template.