Hi, welcome to my page. I am Changrui, you can also call me Ray. Now I am a PhD candidate at CS department of City University of Hong Kong(CityUHK), where I am supervised by Prof. MA Ziye(马梓业). Before that, I was an undergraduate student at Wuhan University, majoring in Information and Computational Science (also called Computational Mathematics), where I was fortunate to receive guidance from Prof. ZHANG Jiwei(张继伟) and Prof. HU Jie(胡捷).

My research interest:

Data centric AI: LLM data selection
Optimization: optimization landscape, training dynamics

Here are my CVs(Curriculum Vitae): CV in English ・ CV in Chinese

🎯 News

2026.09.01 I passed my qualifying examination and became a PhD candidate at CityUHK!
2025.09.01 I began my research life in CityUHK!
2025.04.01 I was selected as the outstanding undergraduate graduate of the School of Mathematics and Statistics in 2025.
2023.11 I won the National Second Prize (Top 2% of 180,000) at the China Undergraduate Mathematical Contest in Modeling with my teammates LIAO Yang(廖洋) and ZHOU Dingbo(周定波)!

📚 Publications

No formal publications yet. Currently working on preprints related to optimization and machine learning.

🏅 Honors and Awards

2025.04 ‧ Outstanding undergraduate graduates of the School of Mathematics and Statistics, Wuhan University
Selected as one of the top graduates for exceptional academic and research performance.
2023.12 ‧ National Encouragement Scholarship.
2023.12 ‧ Excellent Student Scholarship, Wuhan University
Awarded based on GPA and overall performance.
2023.11 ‧ National Second Prize, China Undergraduate Mathematical Contest in Modeling (CUMCM)
Top 2% of 180,000 participants. Team members: LIAO Yang, ZHOU Dingbo.
2021.09 ‧ Freshman Scholarship
The top 10% of Anhui students of Wuhan University Class of 2021

📖 Educations

2026.09 - Present, PhD candidate, Computer Science, City University of Hong Kong, Hong Kong.
2025.09 - 2026.08, PhD student, Computer Science, City University of Hong Kong, Hong Kong.
2023.02 - 2025.06, Undergraduate, Information and Computational Science, Wuhan University, Wuhan.
2021.09 - 2023.02, Undergraduate, Hongyi Honor College(Mathematics), Wuhan University, Wuhan.
2018.09 - 2021.06, Chuzhou High School, Chuzhou