xhs-virtual-product

CS-Fundamentals

A curated collection of Computer Science fundamentals (PDFs, notes, cheatsheets, interview question banks) for placement preparation, covering seven core subjects plus general resources.

investing-for-beginners

A structured investing guide for Chinese beginners covering US stocks, options, and cryptocurrency, with focus on foundational concepts and risk awareness.

ko-lesson

ko-lesson is a Codex skill that transforms course materials into an Obsidian-based learning system with feedback loops, revision tracking, and exam cycles.