Product Thinking (5): Abstraction Thinking — From Math to Systems
How a math background shapes engineering decisions — from group theory to FSMs, from proof structure to API design, and why 700 articles is …
90 min read · 9519 wordsA long-form notebook on machine learning, mathematics, and the cloud infrastructure that runs them.

How a math background shapes engineering decisions — from group theory to FSMs, from proof structure to API design, and why 700 articles is an abstraction engine.
Read the full piece →Each series is a single argument unfolded chapter by chapter.

Groups, rings, fields, and Galois theory — the structural lens on mathematics.

Bailian model platform: prompt engineering, fine-tuning, agents, and evaluation.

The complete guide to building on Alibaba Cloud — compute, networking, storage, databases, AI, security, and infrastructure-as-code.

Production-grade ML on Alibaba Cloud — DSW, DLC, EAS, Designer, QuickStart, end-to-end.

Six-piece field guide to Claude Code — config, modes, slash commands, MCP, hooks, SDK + GitHub.

Infrastructure, networking, and the platforms ML actually runs on.
Recent essays and deep dives, freshest first.
How a math background shapes engineering decisions — from group theory to FSMs, from proof structure to API design, and why 700 articles is …
90 min read · 9519 wordsThe philosophy and engineering of systems that detect, diagnose, and fix their own failures — from watchdog anti-patterns to autonomous …
24 min read · 5828 wordsBuilding a design system from CSS tokens to dark mode to bilingual content — and why consistency matters more than creativity.
40 min read · 4094 wordsThe practical capstone: concrete allocation examples for 10K to 500K, dollar-cost averaging mechanics, rebalancing, behavioral traps, and an …
18 min read · 4276 wordsBonds explained for the person who always skipped that section — yield, duration, the seesaw with interest rates, and what the 2022 crash …
32 min read · 3400 wordsWhy most people should just buy the index — the data, the fees, the Chinese landscape, and the dollar-cost averaging math.
16 min read · 3701 wordsThe grand finale: codify everything from Parts 1-11 into Terraform modules. VPC, ECS, RDS, OSS, RAM, SLS, Function Compute — all provisioned …
84 min read · 8815 wordsThe complete ML platform on Alibaba Cloud: PAI-DSW for notebooks, PAI-DLC for distributed training, PAI-EAS for model serving, Designer for …
52 min read · 5477 wordsThe complete LLM toolkit on Alibaba Cloud: Qwen model family, DashScope API (OpenAI-compatible), Wanxiang image/video generation, Qwen TTS, …
24 min read · 5598 words