Business on Fengyu WANG

The Two-Layer Interface Principle: Software Interaction Architecture for the AI Era

Sun, 13 Sep 2026 00:00:00 +0000

Abstract

Generative AI has pushed the graphical-interface paradigm of “operating software,” unchanged for four decades, to the point of paradigm replacement. Based on a complete audit and refactoring practice across a one-person software company (the FengProj ecosystem: investment research, content production, and private-cloud products — three real systems), this paper proposes and tests the Two-Layer Interface Principle (2LIP): any software system should keep only two interaction layers — (1) the conversation layer, natural-language exchange between human and AI (with Skills as its scripted form), carrying all daily operations; (2) the viewing layer, a read-only graphical interface that exists only for “people who do not operate.” Data always lives in local files, and interaction output flows into a backup-able pipeline. The paper places this principle against three parallel industry currents — YC’s “Chat is the interface,” Generative UI, and the MCP-UI architecture of the OpenAI Apps SDK — and shows that all three converge structurally on the same proposition. It further argues that when AI becomes the first operator, documents (AGENTS/MISSION/todo/logs) themselves constitute a third interface — a governance interface facing the AI — extending “interface” from two ends, human and machine, into a triadic structure of human–AI–document. The case section presents a compliance audit of five systems and their consolidation paths, showing that the principle lands on both personal production systems and external commercial products.

One Person, Hundreds of AI Employees: Translated into Engineering, It's Five Layers

Thu, 10 Sep 2026 00:00:00 +0000

The phrase “one-person company” sounds like a consolation prize — a dignified label for a startup that failed. My version is an engineering problem: a firm with exactly one human, running hundreds of AI employees, with AI leading AI. The chairman does two things only — sets targets, signs acceptances.

Slogans are cheap. The trouble is they have to land. Hundreds of employees: how are they staffed? Who approves when work goes wrong? How are lessons reviewed? Staffing, approval, review — all of them organizational problems, not intelligence problems. Org theory was written for people; software engineering was written for code. Hundreds of AI employees sit stuck in between: they need organizational discipline, yet can only be implemented as code.

Money That Doesn't Bet on Direction

Sat, 01 Aug 2026 00:00:00 +0000

Among the most common signs on Hong Kong streets is the money-exchange shop, and the question follows naturally: with exchange rates moving daily, how do these shops guarantee a profit? The question carries a deeper undertone — does a business exist whose returns depend not at all on calling direction, that earns whether the currency rises or falls? The exchange shop is the living answer, and the answer is almost boring.

Three People Can't Make a Decision

Fri, 10 Jul 2026 00:00:00 +0000

A question deserves a serious answer: why is supreme authority never structured as three people? The intuition feels airtight — three voters, two against one, and majority rule squeezes out a more correct, reasonable, rational decision while guarding against one man’s catastrophic whim. The answer, though, is bleak: across political and organizational history, there is not a single case of supreme power remaining stably in the hands of three. Designers did not overlook the arrangement; the arrangement cannot survive on its own.

A Persona Is a Contract You Can't Exit

Thu, 04 Jun 2026 00:00:00 +0000

Why does Lei Jun keep getting criticized? The answer goes back to 2011, the year Xiaomi and its consumers signed an invisible contract: be your friend, price honestly. Ever since, the public’s tolerance for his mistakes has sat below that granted to any other entrepreneur. The same fine print, the same modest price hike — at another brand it is normal business; at Xiaomi it is betrayal, a rip-off. That is not a double standard. It is contract terms: promise what others never promised, and submit to scrutiny others never face.

Low Money Is Still Money

Wed, 29 Apr 2026 00:00:00 +0000

Here is an awkward fact: someone who has studied advertising and marketing for years, whose skin reacts viscerally to crude ads, holds stock in Pinduoduo — and every day the platform assaults him with red-background, yellow-type visual noise, including install ads for an app already on his phone, pushed at a shareholder. Is low money still money? The moment the question is asked, the answer is already sitting in that portfolio: yes — and it arrives earlier, faster, and more certainly than premium money.

The Existence of Sales

Mon, 02 Feb 2026 00:00:00 +0000

Society’s attitude toward salespeople is remarkably uniform: the least trusted profession, no contest. The strange part: the profession society trusts least is the one every company staffs most heavily. This paradox isn’t human nature’s fault — it’s a pathology. Sales isn’t the disease; it’s the disease setting off alarms.

The Biopsy

Look at how salespeople make a living; each tool maps to an organizational illness. Salespeople bribe the middle layer, right? They charm the top layer. They fool the executives and train the subordinates who know nothing. Bribing the middle, because decision rights don’t sit with the people who actually use the thing. Fooling the top, because the top can’t see how the product really performs. Training the subordinates, because users don’t understand the tool they bought. Add one more — spending enormous amounts of time persuading, with information asymmetry as the raw material.

Refuse to Change, and It's Over

Sat, 31 Jan 2026 00:00:00 +0000

History offers a coincidence: two men named Wang An, nine hundred years apart, dead of the same disease. One built a company from a Boston garage to a valuation that overtook IBM, then went bankrupt within six years. The other turned an empire in a new direction, then watched his reforms repealed one day at a time after his death. Hang their stories side by side, and the diagnosis sheet is the same.

Yes, Yes, Yes — the Most Expensive Labor Cost

Sat, 17 Jan 2026 00:00:00 +0000

There is one type of person I dread. The Duibao-type personality.

The name already circulates in the workplace: you point east, and it’s yes, yes, yes; you point west, and it’s yes, yes, yes again. No pushback, no questions, no corrections, no internal friction; full marks for attitude, competence is a lottery, apologies come instantly, and so does the next offense. He isn’t a bad person — he’s practically a good one: even-tempered, easy to be around, “you’re so right,” “my brain is slow,” “give me a little time” never off his lips. Every apology is sincere, and so is its effect: five seconds of admitted fault buys five hours of peace. When accountability finally reaches him, the moment “my bad” leaves his mouth the chain snaps in midair — he claims every fault, and thereby cancels every fault. Responsibility is left with nowhere to land.

I Wanted the Book, Not Your Tool

Wed, 07 Jan 2026 00:00:00 +0000

I saw an open-source batch-rewriting project, and my first reaction wasn’t admiration — it was regret. Why did nobody publish the books it produced? What use is just the tool? The Count of Monte Cristo rewritten in the voice of Dream of the Red Chamber — that would be delightful. But he never showed me the book. I wanted to read the book, not look at his tool.

That’s the line between a content business and a coding business. Tools get stolen: this project will be copied within days — if Tencent wanted the feature, it ships tomorrow. Content doesn’t get stolen: Dream of the Red Chamber retold by a forum troll is genuinely appealing, like someone dubbing GTA in northeastern dialect. The code can be copied. The flavor can’t.

Invest in Platforms: The Tollbooth Theory

Sat, 03 Jan 2026 00:00:00 +0000

What does value investing buy? My answer is one line: platforms. Nothing stays hot forever unless you own the platform. Apple owns the phone platform, Coca-Cola owns the beverage platform, Visa and Mastercard own the payment platform. Nobody really invests in whatever IP happens to be hot this season.

The concrete version: it doesn’t matter whether your road is smooth. The road can be full of potholes — as long as the tollbooth is on it and yours is the only road, people still pay the toll.

No Root, No Agent

Thu, 18 Dec 2025 00:00:00 +0000

People were seriously asking back in 2011: when will we be able to program on a phone? The most optimistic estimates then would have sounded aggressive set in 2016. It’s 2026. Still not here.

Why? Performance stopped being the issue long ago, and the wall isn’t made of bricks. The phone simply never gave you root.

iOS’s sandbox won’t let you run a compiler freely: switch to your browser to check the docs, and it kills your build process. Android is looser, but Termux-style solutions remain hobbyist toys, never a mainstream path. Fifteen years, chip performance multiplied beyond counting, and the wall hasn’t moved an inch.

Microsoft Can't Even Say Whether the App Opened

Sun, 14 Dec 2025 00:00:00 +0000

Microsoft is a split personality. On one side, DX12 — a watershed in graphics APIs. On the other, the right-click menu, which takes three seconds to open.

Compare: on a Mac, you click once and the icon bounces — you know it opened. On Windows you have no idea: did I click it? Click the wrong thing? Is it frozen, or still loading? You can build DX12 and Prism, but you can’t make “did the app open” legible?

Microsoft Won Purely by Being Early

Fri, 12 Dec 2025 00:00:00 +0000

Can we say it plainly? Microsoft’s victory in personal computing was not a victory of product ability, nor of programming brilliance. It won purely by being early.

Being early was the foundation. IBM came to buy an operating system; Microsoft bought a rough clone, renamed it MS-DOS, and kept the right to license it to clone makers. That one move seized the standard — everything after was rent collection.

In fairness, though: being early alone doesn’t win thirty years. Microsoft’s real craft was welding a merely-adequate product onto the standard position: OEM preinstalls, backward compatibility, antitrust-grade bundling. It won on distribution and lock-in, not on product aesthetics.

Is Duan Yongping's Pop Mart Buy a Mistake?

Mon, 08 Dec 2025 00:00:00 +0000

Will Duan Yongping’s Pop Mart purchase turn out to be his biggest mistake? My view: it won’t be a mistake — and Pop Mart’s structural flaw is real. These two claims must be kept apart.

The flaw first. Pop Mart is essentially a marketing company. Labubu is genuinely nothing, manufactured into something. Compare Nintendo: decades of seriously made games, IP accumulated over generations, real liquidation value. Labubu’s liquidation value approximates fashion itself — when the wind stops, it’s gone. In the AI era this sharpens: short on IP? IP is generated by the second now. Scarcity is the foundation of this business — and the foundation is tidal.

How I Interrogate an AI

Sat, 06 Dec 2025 00:00:00 +0000

An AI’s answers can’t be taken at face value. Not because it loves lying, but because it can be wrong with total confidence — wrong in perfect sentences, with the tone of a citation. Testimony isn’t trustworthy. Experiments are. When I interrogate an AI, there’s a procedure.

Step one: make it run real commands. First thing out of the gate: what code can run in here? Can you ping my website? It dodges — looks up my domain via web search and hands me a “the site is reachable” conclusion. My whole reply: ping first, stop asking. So it writes a Python ping, runs it, and admits: the code runs, the packet never leaves, the container blocks the network. That one step measures two things — where its boundary is, and whether it will rephrase to disguise what it cannot do.

No Games, No WeChat. No Games, No CUDA.

Thu, 04 Dec 2025 00:00:00 +0000

Without games, Tencent might never have built WeChat. Without games, Nvidia would never have had CUDA. Games are an incubator: you wait for them to produce great technology.

The Nvidia line is the clearest. Gaming cards sold by the millions every year; CUDA shipped inside GeForce in 2006 — the gaming market amortized the R&D and the players built the installed base, while everyone waited for a workload that truly needed it. Jensen’s own bet back then was scientific computing, not deep learning. He did not foresee that day.

The Feigou Plan: Essentially, I'm Selling Insurance

Sun, 30 Nov 2025 00:00:00 +0000

The Feigou plan, in one sentence: install a few-megabyte client, and the idle computers and phones in your home become your private cloud drive.

The business model is simpler: sell secondhand phones, and what you’ve actually sold is a lifetime 1TB drive. Fifteen hundred yuan up front; if it dies within a year, I replace it — a dead Xiaomi gets swapped for an OPPO, because what I’m selling isn’t the phone. It’s the storage. Essentially, I’m selling insurance: the phone is the claim item, the secondhand market is the supplier. I don’t even need inventory — when you order, I buy a 1TB phone on the spot and ship it to you.

Make the Easy Money, Not the Hard Money

Wed, 26 Nov 2025 00:00:00 +0000

Everyone in business faces the same question: make the hard money or the easy money? Hard money looks like this: display panels. Bayonet fights against foreign incumbents, ending at a 2.7 percent net margin — brutal. Semiconductors are the same: this industry is hopeless; it must always double — layers double, process complexity doubles. I even wondered: could you run a factory that only makes 1TB drives, never upgrading the process? Then it clicked: a fab makes NAND dies; capacity is assembled downstream. And any factory that stands still gets wiped out at the bottom of the next cycle. Hard money is an arms race — you don’t even get the right to stop.

Docker Is Just a Software Store

Mon, 24 Nov 2025 00:00:00 +0000

Docker is just a software store — one whose apps happen to run on a web page. Server people will never put it that way, but for ordinary users it’s exactly right. Open Docker, search Jellyfin, click install, wait a moment, open an address in the browser — it works. Open the App Store, search WeChat, click install, wait a moment, an icon appears — it works. Users don’t care about containers, images, daemons. They know one thing: I clicked, and the thing runs. Containers and enterprise support are the phenomena. One URL equals one app — that’s the essence.

Don't Trust the Data, Trust the Business

Sun, 16 Nov 2025 00:00:00 +0000

Data can’t be trusted. Stare at the numbers and things will always go wrong — if you don’t understand the business, the data will trick you forever. Numbers are written by people; they can deceive, and they don’t tell everything.

Technical analysis is the disaster zone. If chart patterns really contained a story, some repeatable edge, machine learning would have squeezed it dry decades ago. There’d be nothing left for a retail trader drawing lines by eye.

Tencent Wins by Copying Better

Mon, 10 Nov 2025 00:00:00 +0000

A logic circulates widely: whoever builds the better product wins. That logic has a big problem. Let me put it plainly: Tencent never won because its products were good. It won because it copied well — always the latest to build, the fastest to copy.

Not convinced? Read the feature list. Yuanbao bolted a pile of features onto DeepSeek: voice, image recognition, even phone calls. DeepSeek itself: text chat, images barely legible. And Yuanbao still couldn’t beat DeepSeek — because DeepSeek was already inside it. Users recognize a name, not a feature table.

Apple Is Becoming IBM

Tue, 04 Nov 2025 00:00:00 +0000

All the evidence says Apple is the IBM of this era. The evidence testifies against itself: Apple sued the company founded by Jony Ive. What does that mean? If Jobs were alive, Apple would sue Jobs.

IBM played the same hand: its sharpest tools were lawyers and compatibility walls, and facing a new paradigm it substituted restriction for transformation. Lawsuits buy time; they don’t buy the right to define the next paradigm — a sentence IBM paid for with the entire PC era.

No Human Matches AI's Cognition. Not One.

Wed, 29 Oct 2025 00:00:00 +0000

My sense is that AI’s knowledge and reasoning, in every domain, have already far surpassed mine. The only difference: I need a job and it doesn’t — it can only wait for someone to assign it work. I need to eat; it doesn’t. A person whose cognition matches AI — the world doesn’t contain one.

So the people anxious about “being replaced by AI” have the direction backwards. It lacks nothing except a job; you lack nothing except a tireless, unpaid, omniscient colleague. This isn’t competition. It’s employment — and the structure where the employer panics all day while the employee never complains is itself absurd.

The Adversary Mechanism for Decisions

Sat, 25 Oct 2025 00:00:00 +0000

Speed is the disease of the AI era: every answer arrives instantly. But writing, investing — these don’t need speed. They need to be thought through.

My method is an adversary mechanism. For any decision, let the pro side speak, then the con side, and argue it back and forth. That’s how I invest: a decision only counts when you and your opposing side have both been persuaded.

One seaside property went through dozens of rounds: rental yield, the friction costs of short-term rentals, the spillover logic. Every rebuttal ground my thinking one notch finer; every persuasion patched a blind spot.

50TB for 800 Yuan, Eight Years: The Ledger That Doesn't Balance

Thu, 23 Oct 2025 00:00:00 +0000

50 terabytes, 800 yuan, eight years. A hundred yuan a year; about 2.5 yuan per terabyte — cheaper than buying your own disk, since enterprise drives run 150-200 yuan per terabyte. Everybody knows the vendor is losing spectacularly at this price. So how does the business live?

Start with capacity. What you bought isn’t 50TB — it’s a usage right. Ten thousand users at 100GB each, and the server actually holds two gigabytes for everyone — storage is nearly free; the real cost is bandwidth. And the agreement keeps every right it needs: throttle, limit, clean up, terminate. It’s a wager: they bet you never fill it up and never move it out; you bet they survive eight years without changing terms or wiping your data.

Businesses with Long-Term High Margins

Sun, 05 Oct 2025 00:00:00 +0000

Long-term high-margin businesses keep their books in the columns of human nature that never change.

Greed, fear, loneliness, vanity — these entries have not been revised in millennia. Technology iterates, trends expire, human nature never gets a patch. So the industries that keep producing windfalls collect the same emotions from the same species: speculation collects greed and hope, supplements collect the fear of death, credit collects desire and impatience, the emotion economy collects loneliness. Only the shell changes — alchemy then, “longevity science” now; gambling dens then, derivatives now.

First Principles of Making Money

Wed, 01 Oct 2025 00:00:00 +0000

People throw the phrase “first principles” around as a slogan. I treat it as a tool for dissection: keep asking “what is this built on,” layer by layer, until you hit bedrock. The chain below is what I got when I dissected “making money” that way. Eight layers.

The chain itself

The first principle of making money is creating value, not selling time. The first principle of creating value is solving problems, not providing labour. The first principle of solving problems is identifying real needs, not self-indulgence. The first principle of identifying real needs is practical feedback, not working in isolation. The first principle of practical feedback is fast iteration, not polishing to perfection. The first principle of fast iteration is validating the model, not shipping for its own sake. The first principle of validating the model is systemising it, not grinding alone. The first principle of systemising is leverage, not linear accumulation.

Musk's Five-Step Working Method

Sun, 21 Sep 2025 00:00:00 +0000

The harshest line in Musk’s five-step method is not about automation. It is about deletion: “If you never have to add back something you removed, you are not deleting enough.” The five steps themselves — question the requirement, delete, simplify, accelerate, automate — are worth nothing; every engineering-management textbook carries them. The valuable part is the order. Not one step may be reversed.

Question first, then delete. Most requirements handed to you are, in Musk’s own words, stupid — whoever wrote them. What is harder to guard against is the requirement written by a smart person: people relax their scepticism and treat it as scripture. One round of questioning costs no money. It buys insurance.

A Bank Teller's Existential Crisis

Sat, 30 Aug 2025 00:00:00 +0000

At nine in the morning the shutter rises: the name retires, the staff number clocks in. Six years as a teller is not worth pitying. It is worth dissecting — this job runs every symptom of the service economy through a single window.

Symptom one: time. In year one he watched the clock. By year six he stopped — not from habit, but from switching himself from a person who experiences time to a machine that runs a process: customer arrives, handle, leave. The hard part is never the rush. It is the empty gaps between customers. Behind bulletproof glass, with nothing to do and no one to talk to, only one thing remains: facing his own consciousness. The question “what am I doing” surfaces only in the gaps. Busyness is the anaesthetic; the gaps are the disease.