Jiechao Guan is currently a postdoctoral researcher at The Hong Kong University of Science and Technology (Guangzhou), under the supervision of Professor Hui Xiong. He received his PhD degree in 2023 and B.S. degree in 2018, both from Renmin University of China. His research interests are in machine learning theory and algorithms. In particular, he aim to provide improved generalization bounds for meta learning from the perspective of hypothesis space complexity, PAC-Bayes theory, algorithmic stability, or regret analysis, and develop efficient meta learning algorithms by minimizing the above genralization bounds.