I am a senior undergraduate in Computer Science at Shanghai Jiao Tong University (ACM Honors Class, Zhiyuan College). I am currently a research intern at HuLab, University of Wisconsin–Madison, advised by Prof. Junjie Hu. At SJTU, I work in the Advanced Network Laboratory, advised by Prof. Shengzhong Liu and Prof. Fan Wu. Previously, I was a research intern at Audiocc, advised by Prof. Chenda Li and Prof. Yanmin Qian. Friends call me Hugo.
My research centers on test-time computation and efficient reasoning in large language models: RL-based post-training, inference-time reasoning control, and test-time training and adaptation. More broadly, I want to understand the principles of computation and inference that lead to efficient, generalizable intelligence across modalities.
I am applying to PhD programs for Fall 2027.
Shares test-time-training fast weights across the whole depth stack instead of keeping one private state per layer, which turns the model into a single recurrence over (chunk, layer) and improves long-context retrieval at equal state size.
A sparse Mixture-of-Experts framework that routes experts over time frames and mel bands, raising the capacity of speech-separation models with almost no extra inference cost (+3.8 dB SDR over BSRNN on Libri2Mix at a comparable 4.1 GMACs/s).
GRPO-based efficient reasoning with progressive chain-of-thought length calibration: it estimates the optimal reasoning length for each question and adapts the length-reward coefficient, cutting reasoning tokens by up to 52% while improving accuracy on benchmarks such as AIME25.
Test-time training for efficient long-context modeling on top of LaCT-style fast-weight memory; making the test-time memory more scalable through shared state, sparse routing, and adaptive updates.
Reinforcement learning and post-training for efficient LLM reasoning, including chain-of-thought compression and on-policy distillation.
Making speech-separation models cheaper to run without shrinking their capacity, via sparse MoE routing over temporal frames and mel-frequency bands.
Course notes and research notes. English translations of the Chinese originals.