A management system for municipal engineering projects. Many stakeholders, long processes, everything must be traceable, different roles acting at each stage from initiation to settlement. The difficulty was business logic, not technology — a state machine finally straightened it out.
A cross-border storefront built end to end myself — from site to payment to fulfilment. Multi-currency, multi-language, third-party payments and overseas logistics. The hard part was the uncertainty in every link; daily automated reconciliation finally made it stable.
A writing tool for long-form work — chapter management, multiple books in parallel, autosave and cloud sync.
A-share market data collection and quantitative analysis backend, supporting multiple data sources, scheduled cache warm-up and real-time quote APIs.
A full-stack utility site bundling many practical tools, paired with a WeChat mini-program client and membership center, including channel management and role-based permissions.
An AI search optimization platform for brands — measures mention rate, citation rate and description accuracy across DeepSeek, Doubao, Yuanbao and other AI engines, then recommends content improvements.
