About me

I am a Research Scientist at Meta MRS (Modern Recommendation System). My research interest is building scalable machine learning models for intelligent information systems, including recommender systems, ranking models, and agentic AI.

My current work focuses on developing large scale machine learning models for recommendation systems, with an emphasis on user behavior modeling, retrieval, ranking, and real-world deployment. I also conduct research on trustworthy AI agents for information reasoning, evidence retrieval, and misinformation detection.

Research interests

Recommendation Systems, Large Language Models, AI Agents

Publications

1. RankGraph-2: Lifecycle Co-Design for Billion-Node Graph Learning in Recommendation
   Renzhi Wu, Zikun Cui, Junjie Yang, Tai Guo, Hong Li, Xian Chen, Li Yu, Ke Pan, Sri Reddy, Mahesh Srinivasan, Nipun Mathur, Haomin Yu, and Hong Yan. (2026). "RankGraph-2: Lifecycle Co-Design for Billion-Node Graph Learning in Recommendation." ACM Conference on Recommender Systems (RecSys). Accepted / To appear.
2. CMSL: Constructive Multi-Sequence Learning for Recommendation Systems
   Zikun Cui, Renzhi Wu, Junjie Yang, Li Sheng, Jijie Wei, Linfeng Liu, Tai Guo, Tao Jia, Xiaodong Wang, Hong Li, Li Yu, Sri Reddy, and Hong Yan. (2026). "CMSL: Constructive Multi-Sequence Learning for Recommendation Systems." Proceedings of the 49th International ACM SIGIR Conference on Research and Development in Information Retrieval.
3. Code as Agent Harness
   Xuying Ning, Katherine Tieu, Dongqi Fu, Tianxin Wei, Zihao Li, Yuanchen Bei, Jiaru Zou, Mengting Ai, Zhining Liu, Ting-Wei Li, Lingjie Chen, Yanjun Zhao, Ke Yang, Bingxuan Li, Cheng Qian, Gaotang Li, Xiao Lin, Zhichen Zeng, Ruizhong Qiu, Sirui Chen, Yifan Sun, Xiyuan Yang, Ruida Wang, Rui Pan, Chenyuan Yang, Dylan Zhang, Liri Fang, Zikun Cui, Yang Cao, Pan Chen, Dorothy Sun, Ren Chen, Mahesh Srinivasan, Nipun Mathur, Yinglong Xia, Hong Li, Hong Yan, Pan Lu, Lingming Zhang, Tong Zhang, Hanghang Tong, and Jingrui He. (2026). "Code as Agent Harness." arXiv preprint arXiv:2605.18747.
4. Toward Verifiable Misinformation Detection: A Multi-Tool LLM Agent Framework
   Zikun Cui, Tianyi Huang, Chia-En Chiang, and Cuiqianhe Du. (2025). "Toward Verifiable Misinformation Detection: A Multi-Tool LLM Agent Framework." International Conference on Generative Artificial Intelligence for Business.
5. CL-ISR: A Contrastive Learning and Implicit Stance Reasoning Framework for Misleading Text Detection on Social Media
   Tianyi Huang, Zikun Cui, Cuiqianhe Du, and Chia-En Chiang. (2025). "CL-ISR: A Contrastive Learning and Implicit Stance Reasoning Framework for Misleading Text Detection on Social Media." International Conference on Electronic Communication and Artificial Intelligence, IEEE.
6. Adaptive Graph Convolution and Semantic-Guided Attention for Multimodal Risk Detection in Social Networks
   Cuiqianhe Du, Chia-En Chiang, Tianyi Huang, and Zikun Cui. (2025). "Adaptive Graph Convolution and Semantic-Guided Attention for Multimodal Risk Detection in Social Networks." International Conference on Artificial Intelligence, Automation and High Performance Computing, IEEE.
7. Global Consistency in Response of Terrestrial Ecosystem Respiration to Temperature
   Zhiyuan Zhang, Huanyuan Zhang, Zikun Cui, Feng Tao, Ziwei Chen, Yaxuan Chang, Vincenzo Magliulo, Georg Wohlfahrt, and Dongsheng Zhao. (2021). "Global Consistency in Response of Terrestrial Ecosystem Respiration to Temperature." Agricultural and Forest Meteorology, 308-309:108576.

Services

Reviewer

• Transactions on Information Systems
• Multimedia Systems
• Neural Processing Letters
• Information Technology and Control
• Internet Technology Letters
• Transactions on Consumer Electronics

Background