China Is 3D-Printing Entire Buildings — And Stacking Them in Just 28 Hours

Added: 2026-05-13

[00:00:00]On April 13th, 2026, a Chinese company called Geely held a press conference and announced something that engineers had spent decades calling physically impossible.

[00:00:11]Not difficult, not expensive, impossible.

[00:00:14]The number they put on the screen was 48.41% and if that sounds like a random statistic, let me tell you what it actually means in plain English.

[00:00:24]When your car burns fuel, most of that energy disappears. It goes out the exhaust as heat. It gets soaked into the engine block. It vanishes into grinding metal parts.

[00:00:34]A normal car from a top brand like Toyota or Volkswagen only uses about 30% of the energy in the fuel you pump in.

[00:00:42]70% is just gone, wasted, turned into heat that does absolutely nothing useful for you.

[00:00:49]For over 100 years, engineers have been trying to shrink that waste and the best any mass-reduced car engine had ever achieved in history was 41%.

[00:00:58]Toyota celebrated that number like a moon landing. They spent billions of dollars getting there. They told the world it was essentially the ceiling, that going any higher would cost more than it was worth and push right up against what the laws of physics even allowed.

[00:01:14]Geely just walked past that ceiling like it was not there.

[00:01:18]Certified, officially measured, recognized as a Guinness World Record.

[00:01:24]That is not a small step forward. That is not a software update. That is an entirely different universe of engineering.

[00:01:32]And the wildest part is not even the number itself. It is how they actually did it.

[00:01:37]That story involves a tornado inside a cylinder, an engine that deliberately runs hot and cold at the same time, and an 11-in-1 machine that looks nothing like a traditional engine.

[00:01:48]If you are new here and you love stories about technology that genuinely changes the world, hit that subscribe button and the notification bell right now. We cover these engineering breakthroughs the moment they happen, and you do not want to miss what is coming next. But first, let us make sure you actually feel the weight of this number. Because to understand why 48% is so absurd, you need to understand why 41% was supposed to be the finish line. Why 40% was supposed to be the wall.

[00:02:17]Think of a combustion engine like a campfire stuffed inside a metal box. You throw fuel in, it catches fire, the explosion pushes a piston down, and that motion eventually turns your wheels.

[00:02:29]Simple enough on paper.

[00:02:31]But here is the problem. Fire produces a massive amount of heat, and heat does not care about your wheels. It wants to spread everywhere equally, into the metal walls, into the air around the engine, out the exhaust pipe. The engine is constantly fighting to keep that energy pointed in one useful direction, and it loses most of that battle every single time. There is a rule in physics called the Carnot limit. You do not need to memorize the name, but here is what it means in plain language. There is a hard mathematical ceiling on how efficient any heat engine can ever be.

[00:03:03]It depends on how hot your explosion is versus how cold your exhaust is.

[00:03:09]The bigger that gap, the more work you can theoretically squeeze out. But there are limits on both ends. Make the explosion too hot, and you melt your own engine. Keep the exhaust too cold, and your pollution control system stop working.

[00:03:23]For decades, engineers at Toyota, Honda, BMW, and Volkswagen treated 40% like a brick wall. Getting from 35% to 41% took billions of dollars and decades of patient refinement. Toyota got there using a clever trick called the Atkinson cycle, where you leave the intake valve open just a tiny bit longer than normal.

[00:03:45]That small change reduces wasted compression energy and squeezes out a few extra percentage points of efficiency. When Toyota hit 41% with their 2.5 L Dynamic Force Engine, the entire industry stood up and applauded.

[00:03:59]Engineers published papers stating that going significantly further was practically impossible at any reasonable cost.

[00:04:06]The prevailing wisdom was that pure electric vehicles were the future anyway. So, why keep pushing a technology that was already being phased out?

[00:04:15]That assumption turned out to be one of the most expensive misjudgments in modern automotive history. And while Western automakers were busy betting their companies on a fully electric future, engineers in China were asking a very different question. What if we just started over from scratch?

[00:04:31]That question led to the first crack in the wall, and it came from a company you may already know. The first warning shot nobody took seriously.

[00:04:40]Before we talk about 48%, we need to talk about 46, because that is where the story really begins to shift.

[00:04:47]BYD, which stands for Build Your Dreams, looked at the traditional hybrid car and basically called the whole design outdated. In a standard hybrid, the engine and the electric motor are both working to drive the wheels at the same time. The engine is constantly changing speeds. It revs up on hills, slows down at traffic lights, shifts gears through a complicated transmission. Every time the engine changes speed, it drifts away from the zone where it runs most efficiently. BYD had a different idea.

[00:05:16]What if the engine did not drive the wheels at all for most of your journey?

[00:05:20]What if it just stayed at one perfect speed and acted purely as a generator making electricity? The wheels would be driven entirely by electric motors, and the engine would only ever do one job.

[00:05:31]Run at exactly the RPM where it works best, nothing else.

[00:05:35]Because the engine no longer had to chase the road, BYD could tune it obsessively for that single operating point. No compromises, no tradeoffs.

[00:05:44]The result was their DM-i system, which hit 46.06% thermal efficiency on their fifth generation platform. The global automotive press was genuinely stunned.

[00:05:55]A 5% jump in thermal efficiency sounds modest until you realize it took Toyota roughly 20 years and several billion dollars to gain the 5% that brought them from 36 to 41.

[00:06:07]BYD did it in a fraction of the time with a fundamentally different approach.

[00:06:12]Legacy automakers had a quiet moment of panic. Then most of them went back to their roadmaps and told themselves this was a regional story that Western consumers would not accept it.

[00:06:21]They said the same thing about Japanese automakers in the 1980s. We all know how that ended. But here's the thing. While the industry was still trying to process BYD's 46% Geely had already been working for 2 years on something that would make even that achievement look like a warm-up act. And the key to what they built starts inside the cylinder itself in a place no one thought to look. The tornado inside the engine.

[00:06:46]This is where things get genuinely wild.

[00:06:48]Geely's new IHEV system did not just improve on existing engine design. It threw out the rulebook on how air and fuel mix inside a cylinder. And this one change is responsible for a huge chunk of that record-breaking efficiency number. Here is the problem with a normal engine. When air and fuel get pulled into the cylinder, they do not mix evenly. Think about pouring cream into a cup of coffee without stirring it. You get uneven swirls. Some spots are thick with cream, other spots are mostly coffee. The same thing happens inside a traditional cylinder. You get pockets where the mixture is too rich and pockets where it is too lean. When the spark plug fires into that uneven mixture, the flame does not spread all at once. It starts at the spark and slowly ripples outward like a wave. And while that wave is crawling across the chamber, heat from the first burst of flame is already bleeding into the surrounding metal walls. By the time the whole mixture has burned, you have lost a significant chunk of energy to the engine block itself. That wasted heat is one of the biggest reasons traditional engines struggle to cross the 40% mark.

[00:07:53]Gigli's engineers solved this with what they call the Yuang tornado combustion system or the fire tornado.

[00:07:59]They completely redesigned the shape and angle of the air intake channels. When the intake valve opens, the incoming air is not just pulled in passively. It is forced into a high-speed spinning vortex, a literal controlled tornado inside the cylinder.

[00:08:14]When the spark plug fires into that spinning tornado, the flame does not slowly creep across the chamber. It explodes outward in all directions simultaneously because the fuel and air are already perfectly blended from all that turbulent spinning. The combustion is sharp, clean, and synchronized.

[00:08:32]Almost all the energy goes straight down onto the piston before the heat has a chance to leak into the walls. Less wasted heat, less pollution. More force on the piston, more efficiency.

[00:08:43]But cranking up combustion like this creates a new problem.

[00:08:46]The hotter and more compressed your explosion, the more likely you are to cause engine knock.

[00:08:52]That is when fuel ignites before the spark plug even fires, creating an uncontrolled bang that can crack pistons and destroy an engine within minutes.

[00:09:00]Solving the knock problem is what kept engineers stuck below 41% for so long.

[00:09:05]And Gigli's answer to it is just as clever as the tornado itself. When we proposed the idea of an engine that runs hot and cold at the same time, every engineering textbook will tell you that running a combustion engine at extreme compression and extreme heat is a guaranteed path to catastrophic failure.

[00:09:22]You cannot push the explosion harder without risking destroying the engine from the inside.

[00:09:27]That has been the wall. That is why nobody cracked 41% in a mass-reduced engine for over two decades. Jay's answer was to make the engine run hot and cold simultaneously in different zones completely on purpose.

[00:09:40]In a normal car, the cooling system sends water through the entire engine at roughly the same temperature.

[00:09:46]It is a one-size-fits-all compromise that works reasonably well, but it treats the top of the engine and the bottom of the engine as if they need the same thing.

[00:09:55]They do not.

[00:09:56]Jelly split the cooling system into two completely independent zones. The cylinder head, which is the very top of the engine where the explosions happen, is kept extremely cold. Coolant flows fast and aggressively through this zone, pulling heat away the moment it appears.

[00:10:13]Keeping the top cold means the air charge stays dense and cool right up until the moment of ignition.

[00:10:19]That prevents premature detonation and allows the engine to run at a far higher compression ratio than would normally be safe.

[00:10:26]More compression means more energy extracted from every single explosion.

[00:10:31]Meanwhile, the engine block down below where the pistons slide up and down thousands of times a minute is kept deliberately warm.

[00:10:38]Why would you want part of your engine to stay hot? Because warmth thins out the engine oil. Thinner oil means the pistons slide with dramatically less friction. Every tiny bit of friction you eliminate is energy that reaches the wheels instead of being wasted as heat from metal grinding against metal. So, you have a single engine that is cold at the top to allow massive compression and warm at the bottom to minimize friction.

[00:11:01]In traditional engine design, those two goals directly conflict with each other.

[00:11:05]Jelly built a system where both happen at the same time in different parts of the same engine. The whole thing is managed by an electronic water pump that reads engine conditions dozens of times per second and adjusts coolant flow instantly. It sounds like it should not work, and that is exactly why it does.

[00:11:21]Nobody else was building it because the conventional wisdom said the trade-offs made it pointless.

[00:11:28]But even the most efficient engine ever built is only half the story.

[00:11:33]Getting all that energy to the wheels without losing it in a complicated gearbox is the other half.

[00:11:39]And what Gilli built to solve that problem is just as revolutionary.

[00:11:44]Throwing the gearbox in the trash.

[00:11:47]Even a 48% efficient engine is useless if you bleed that efficiency away fighting through a heavy complicated transmission.

[00:11:56]Traditional automatic gearboxes are mechanical masterpieces, but they are also heavy and full of friction.

[00:12:03]An eight or nine-speed automatic has hundreds of individual moving parts.

[00:12:07]Clutch packs, hydraulic torque converters, shift forks, synchronizers.

[00:12:13]Every single one of those parts absorbs a little bit of the energy you just worked so hard to generate.

[00:12:19]The whole system can weigh over 100 kg and still waste a meaningful percentage of the engine's output before the power ever reaches your wheels. Toyota's hybrid system uses something called an ECVT, a planetary gear set that was genuinely revolutionary when it debuted in the late 1990s, but it is now a concept over 25 years old.

[00:12:41]It adds weight and mechanical complexity that a modern hybrid powertrain simply does not need anymore.

[00:12:47]Jay looked at all of that and started from a blank sheet of paper.

[00:12:50]What they built is called the 11-in-1 EDHT intelligent drive system.

[00:12:55]Instead of a gearbox, it is an electromechanical power router.

[00:12:59]It packages the engine, the generator, two electric motors, the high voltage inverters, and the thermal management hardware all into one single compact housing.

[00:13:08]The total powertrain weight dropped by 13.1.5% compared to traditional hybrid setups.

[00:13:14]There are no shift forks, no hydraulic fluid channels, no torque converters.

[00:13:19]For about 90% of your daily driving, the combustion engine has zero physical connection to your wheels at all.

[00:13:26]The engine runs at its perfect efficiency sweet spot and powers a generator. That electricity goes either to the battery or directly to the electric motors spinning the wheels.

[00:13:36]From the driver's seat, the whole experience feels like a fully electric car. Silent, smooth, instant torque from the moment you press the pedal.

[00:13:44]The only time the system physically connects the engine to the axle is at steady high-speed highway cruising.

[00:13:51]At around 80 mph and above, routing power through the electric motors actually wastes more energy than a direct mechanical connection. So, the system automatically detects that condition and locks the engine to the wheels like a top gear, bypassing the electrical conversion entirely.

[00:14:08]Managing all of this is an AI system that recalculates the most efficient way to route power 50 times every single second. It reads your navigation map, spots the hill coming up 3 km ahead, and decides in real time whether to charge the battery now and coast down the other side, or use the battery now and let the engine recharge on the descent. It is thinking about your entire journey in a way no human driver ever could.

[00:14:33]The combined result of all of this, the fire tornado combustion, the split thermal zones, the 11-in-1 drive unit, and the AI power routing is a certified fuel consumption figure of 2.22 L per 100 km.

[00:14:49]That is a Guinness World Record for production vehicles.

[00:14:52]On a full tank, you are looking at a range of over 2,000 km. That combination of numbers changes the conversation about what a car can actually be, and that is worth talking about directly.

[00:15:03]What this actually means for the rest of the world. Here is the honest picture.

[00:15:08]Pure electric vehicles are genuinely great in the right conditions. Silent, efficient, zero tailpipe emissions on the road.

[00:15:16]But they come with real tradeoffs that millions of buyers around the world are not ready to accept yet.

[00:15:21]A large electric SUV needs a battery pack that can weigh over 500 kg.

[00:15:26]Charging infrastructure is still thin across huge parts of the globe, and range anxiety is a real practical barrier for real people with real lives.

[00:15:36]What the Geely e-HFE system represents is a completely different path through the transition. You get the smooth, silent, instant torque commute of a fully electric car for your daily driving, but your total range is over 2,000 km. You can fill up at any petrol station on the planet. You do not need a charging network, and the fuel cost per kilometer is comparable to a pure electric vehicle in most markets.

[00:16:00]The vehicle doing all of this is not a small, lightweight commuter, either.

[00:16:04]This is a full-size SUV burning less than 2 and 1/2 L per 100 km in real-world conditions.

[00:16:10]For Western and Japanese automakers, this creates a genuinely difficult challenge.

[00:16:15]The internal combustion engine was invented in Europe. Germany, France, and Britain dominated it for over a century.

[00:16:22]Japan refined it to what everyone thought was near perfection over 50 years. The record for combustion engine efficiency now belongs to a company that did not have a serious global automotive presence 15 years ago.

[00:16:34]Closing that kind of gap is not something you do with a firmware update or a new advertising campaign.

[00:16:40]It requires rebuilding engineering pipelines, asking different questions, and funding years of research.

[00:16:46]That is a difficult ask when your investors are simultaneously pushing you to go fully electric, and your combustion technology is falling further behind at the same time.

[00:16:56]But for consumers everywhere, that competition is actually good news.

[00:17:00]History shows that when engineering ambition like this enters a market, prices drop and technology improves across the board.

[00:17:08]Legacy automakers will eventually respond. The question is just how much ground shifts in the meantime.

[00:17:14]What Geely has proven beyond any single number is that the combustion engine still had enormous life left in it. The limit was never the laws of physics. It was the limits of what people believed was worth trying.

[00:17:27]If you made it this far, you now understand more about engine efficiency than most people who write about cars for a living.

[00:17:34]And honestly, that feels like the right place to end.

[00:17:37]If you found this useful, hit the like button, subscribe, and ring the notification bell so you never miss a breakdown like this one.

[00:17:45]We are going to keep following this story as legacy automakers start to respond. And that is going to be a fascinating watch.

[00:17:52]Now, I want to hear from you.

[00:17:54]Do you think the 48% hybrid is the smartest bridge to a fully electric future?

[00:17:58]Or do you think pure electric vehicles will leapfrog all of this faster than anyone expects?

[00:18:03]Drop your answer in the comments below.

[00:18:05]I read every single one.

[00:18:07]See you in the next one.