Ever wondered who invented the ticking heart inside your mechanical watch?
The little part that goes click-click-click instead of spinning freely?
I used to think it was the Europeans. Swiss watchmaking. Seiko. The usual names.
Then I opened the Xiamen City Chronicles.
There’s a man in there. Su Song. Born in 1020, in Tongan, Fujian.
And he did something that made me stare at my screen for five straight minutes.
In 1088, he built a tower.
Not a pagoda. A 12-meter “time machine.”
Called the Water-Powered Armillary Sphere and Celestial Globe.
My first thought: A Song Dynasty guy? A time machine? You’ve got to be kidding me.
But the local archives spell it out, clear as day.
Three levels. Top floor watches the stars. Middle floor maps the sky. Bottom floor — keeps time.
The bottom floor is the real story.
Because down there, there’s a mechanism called the escapement.
You might not know the word, but it’s inside every mechanical watch you’ve ever worn. It’s the “heart” that makes the gear train tick forward, one click at a time, instead of just spinning loose.
Su Song’s version ran on water. Drop by drop. Gear by gear. Rock solid.
The same concept didn’t appear in Europe until 600 years later.
Six. Hundred. Years.
Let me put that in perspective. Columbus reached the Americas in 1492. Su Song’s clock was built in 1088.
Meaning: while Columbus was still crossing the Atlantic, this mechanism had already been ticking quietly in a tower near Quanzhou for four centuries.
I don’t know about you. But when I read that, I just sat there for a moment.
And that’s not even the part that blew my mind the most.
Su Song is kind of terrifying.
He didn’t just build clocks. He also wrote a book called Tu Jing Ben Cao — the Illustrated Herbal.
Here’s what he did:
He sent artists across the country to draw every medicinal plant they could find. Roots, stems, leaves, flowers — down to the smallest detail. Then he made them note the harvest season and the exact location where each plant was found.
No cameras. No internet. No way to verify things remotely.
And a Song Dynasty official just… organized a nationwide “herbal data collection project.”
This wasn’t writing a medical book.
This was building a database.
My reaction in one word: unreal. The kind of unreal that gives you goosebumps.
And then there’s the thing that happened in 1988.
That year, the Xiamen Special Economic Zone was on fire. Everyone was building, trading, chasing growth.
But the government set aside money to restore Su Song’s ancestral home in Tongan. And built a Su Song Science and Technology Museum.
Think about that timing.
- China’s reform was in full sprint. Xiamen, as a SEZ, was racing against the clock.
And they stopped. To honor a scientist who had been dead for 900 years.
When I read that, one sentence just appeared in my head:
A city that knows where it came from, knows where it’s going.
The people of Xiamen quietly wove Su Song into their city’s cultural DNA.
And if you look at what came next — the Torch Plan, precision manufacturing, the semiconductor push — that road, in some sense, starts with the sound of gears turning in a tower built in 1088.
Three things I want to leave you with. Not a summary, just… three thoughts.
First:
Su Song’s clock tower taught me that real innovation isn’t about lightning strikes of genius. It’s about calculation. Gear ratios were calculated. Water flow was calculated. Star positions were calculated. The “underlying algorithm” from 900 years ago — every link in the logic chain holds.
Second:
From the Tu Jing Ben Cao to modern digital archives, I’m increasingly convinced that civilization is, at its core, the evolution of how we record information. Without standardized records, culture doesn’t survive. Su Song built a database with woodblock prints. We build one with 3D models that make his clock tower spin again in virtual space. Different tools. Same ambition.
Third — and this is the one I really want to say:
Whether a place can create great things often depends on whether it remembers the great things it once created.
Xiamen remembers Su Song. That’s its ace in the hole.
Su Song isn’t some distant historical figure.
He’s just a curious person from the Northern Song who happened to use gears and star maps to lock time and truth onto the same axis.
A great civilization knows two things:
How to measure time.
And how to record what’s real.