Changhao (Chase) Sun

Tokyo JR-themed multiplayer card game. Players compete to build train routes across the JR network. Built with React 19 and real-time multiplayer via Socket.IO.

Generative AI startup project helping travelers navigate foreign-language menus. Built a Streamlit MVP with Gemini API for multimodal menu understanding, allergen inference, embedding-based RAG, and a 4-tier image fallback pipeline.

End-to-end NLP pipeline for detecting actionable suggestions in high-star hotel reviews. Benchmarked TF-IDF, DistilBERT, and Qwen 2.5, fine-tuned DistilBERT with threshold optimisation, and applied BERTopic clustering to surface service improvement insights.

An interactive research assistant that converts an industry query into a structured LLM-generated market research report from automatically retrieved sources, with input validation and sub-30-second delivery.

Master's thesis at UEC Tokyo. Proposed Sparse Coordinated Capacity Sharing (SCCS) with structured sparse masking matrices for privacy-preserving collaborative linear programming.

Responsive wave-based bullet-hell shooter built with vanilla HTML5 Canvas. Players control a pixel cat defending against alien invaders across four difficulty levels, with multiple enemy types, collectible weapon power-ups, and touch controls for mobile.