To be honest, before going to Germany, many people had grown a bit immune to the term “Industry 4.0.”

In recent years in China, everything has been labeled “Industry 4.0”—buy a robot, implement an MES system, and you’d almost want to slap a “4.0 factory” label on yourself. But this time, Huazhi International took clients on a tour of Munich, Stuttgart, and Frankfurt. After visiting these locations, everyone’s strongest impression was this: when Germans talk about Industry 4.0, they don’t just discuss concepts—they lay out the numbers for you.

What’s more, they have a complete set of criteria: why to repost, who will repost it for you, and what form it should take.

These three places perfectly tie this thread together.

01.

Munich School of Business: Do the Math First, Then Transform

The first stop was the Munich School of Management, where Professor Michael gave the lecture.

This old guy was quite interesting. Instead of starting off by touting how amazing Industry 4.0 is, he began by throwing out a term called the “process paradox”—no matter how well you optimize your internal processes or how much you boost efficiency, if the business model itself is outdated, the company will still go under.

As he said this, many entrepreneurs in the audience immediately thought of examples they’d seen firsthand. Some factories have truly impressive production lines, yet the products they sell are becoming less and less valuable, with profit margins as thin as paper. So where does the problem lie? It’s not that production is failing; it’s that the way they make money needs to change.

He then gave two very straightforward examples.

One was Airbus. In the past, they sold airplanes, earning money on a per-unit basis. Now they’ve launched the Skywise data platform to help airlines with predictive maintenance—telling them in advance when a specific part on their aircraft might fail. So Airbus no longer sells airplanes; instead, they sell “flight hours.” You pay by the hour, and they guarantee the aircraft will fly. This transforms a one-time sale into a long-term service contract, ensuring revenue year after year.

The other example is Hilti. They make power tools. They used to sell electric drills, but they don’t do that anymore. They’ve connected the drills to the internet and switched to a subscription model: customers pay monthly, have access to a drill at all times, and get an immediate replacement if it breaks. You’re buying “access to a drill,” not the machine itself.

After the professor finished discussing these two cases, an entrepreneur in the audience murmured, “Isn’t that just like car rentals?” Yes, but they’ve turned it into a high-end service with profit margins far higher than selling products.

The professor also provided a wealth of financial data. Mercedes-Benz’s Factory 56, with an investment of 730 million euros, saw a 25% increase in productivity and recouped its investment in five years. Bosch’s smart factory, with a 500 million yuan investment, saw machine downtime reduced by 20% and scrap rates cut by 30%, with a payback period of four to five years. Every figure was calculated with crystal-clear precision.

So, don’t rush to install equipment—first, think carefully about whether your business model needs to change. If the numbers don’t add up, don’t make a move.

02.

弗劳恩霍夫研究所：别自己硬扛，要学会借力

The second stop was the Fraunhofer IAO Institute. To be honest, before we went, many of us didn’t really know what to expect from an institution like that. We just assumed it was a research facility where we’d attend a lecture and that would be it.

After hearing the presentation, I realized that this kind of organization really doesn’t exist in China. It’s somewhat like an “industry think tank,” but it’s not purely theoretical. The government provides some funding, and companies contribute the rest, and in return, it helps businesses with customized R&D and solutions. Siemens and Bosch are among its clients.

The institute staff spent a class period explaining what they do, then gave the Huazhi clients a tour of the building. The building housed all kinds of labs and demonstration lines, and some of the technology looked pretty high-tech.

But what resonated most with the entrepreneurs was not the technology itself, but this model of “leveraging existing resources.”

In China, many companies looking to go digital either have to start from scratch on their own or spend a fortune hiring consulting firms. In Germany, however, there are organizations like the Fraunhofer Society: you take your challenges to them, and they help you with R&D, testing, and even connecting you with resources. You don’t have to shoulder everything on your own.

On the ride back, a manufacturing executive remarked, “We’re always fixated on self-reliance, but sometimes that actually backfires. The Germans, on the other hand, spend money when they need to and leverage outside resources when appropriate—they’re much more efficient.”

That hits the nail on the head. Industry 4.0 isn’t just about a single company—it’s an ecosystem. You don’t need to reinvent the wheel; you just need to find the right people to help you build it.

03.

Mercedes-Benz Factory: The vision is grand, but the reality is... well, pretty down-to-earth

The third stop was the Mercedes-Benz factory.

This factory is incredibly well-known in the industry. With a 730 million euro investment, Mercedes-Benz has built it as a showcase for Industry 4.0. Upon entering, the first impression wasn’t the usual roar and grease of a traditional car factory; instead, it felt more like a high-tech park—quiet, clean, and filled with AGVs zipping around.

The tour guide led everyone on a tour, highlighting two key points.

The first was flexible production. Many domestic automakers can only produce one model per assembly line, requiring a shutdown and reconfiguration whenever they switch models. But at Factory 56, the final assembly line can simultaneously produce internal combustion engine vehicles, hybrid vehicles, and pure electric vehicles. Three completely different powertrain systems can be switched on the same production line without any downtime. How is this achieved? Through a digital assistance system—screens at each workstation display real-time assembly data and torque requirements for the current model, allowing workers and robots to coordinate for seamless transitions.

A CEO from the equipment manufacturing sector watched intently for a long time and remarked, “On our production lines, switching models requires a half-day shutdown, but here they switch without stopping production.”

The second point is order-based production. You won’t see rows of finished vehicles in stock at this factory. Every vehicle is only scheduled into the system after a customer places an order, and the entire process—from welding and painting to final assembly—is strictly order-driven. Most impressively, even vehicles with highly personalized configurations—such as custom interior colors, wheel designs, and even stitching colors—are still scheduled on time. The tour guide explained that supply chain transparency and precise logistics scheduling are the prerequisites for this system to function effectively.

One customer asked a very direct question: With all this automation and flexibility, can the costs be recouped?

The guide didn’t dodge the question. He acknowledged that the initial investment was indeed substantial, but after crunching the numbers, productivity had increased by about 25%. Furthermore, because mixed-line production saved on factory floor space and avoided duplicate equipment investments, the project was expected to break even within five years. Seeing the data the professor had mentioned earlier in the form of tangible reality on the factory floor made for a completely different experience.

As everyone left, the discussion on the bus went on for quite a while. It wasn’t about those flashy robots; instead, they were pondering a question: If even a complex product like a Mercedes-Benz can achieve “flexible mixed-line production combined with order-based manufacturing,” could their own industry also move in this direction?

To be honest, after visiting these three places, I’ve come to realize that the core of Germany’s Industry 4.0 initiative isn’t some cutting-edge technology, but rather a straightforward methodology: first, figure out why you’re making the transition (business schools will run the numbers for you); second, find the right partners to help you make the transition (research institutes will provide the technology); and finally, see how others have successfully made the transition (factories will serve as models).

The order must not be reversed. Many domestic companies jump straight into buying equipment and implementing systems, only to find that their business models remain unchanged—and they still fail to turn a profit.

What Huazhi International has always done is take entrepreneurs to see these things firsthand. Instead of sitting in an office listening to concepts, we stand in the workshop or sit in the conference room and talk to the people who have actually done the work.