Winter in Shenzhen lacks the bleak northern winds and sweeping snow, but instead burns with a fiery mix of technology and ambition. There is no quiet scene of snow-laden branches here—only countless innovators, like modern-day swordsmen, cutting through the tides of the smart-wearable world to carve out their own legends.
To them, the cold night is a whetstone that sharpens their technical edge;
cutting-edge technology is their Heavenly Sword for conquering future markets. And every
dream-chaser working diligently in Shenzhen is a living footnote to this city’s
relentless “martial-arts world.”
As night falls, the lights of NiuLanQian Building in Minzhi flicker on like constellations across the skyline. Inside the AI Lab of Geyan Technology, the atmosphere remains restless with focus and intensity. Lead algorithm engineer Li Feifan and his team stare at streaming data, fingertips dancing across keyboards like sword strokes—each keystroke injecting new “internal power” into a custom-built smartwatch for clients.
In the smart-wearable circle, this team is well-known and respectfully called “The Four-Edge Crafters.”

Their reputation comes from four core “martial skills” in smartwatch
customization:
· Custom Logo engraving the brand’s identity
· Exterior Design tailored to any aesthetic
· UI Customization for unique user interaction
· PCB & App customization enabling full-chain adaptation from hardware architecture to app experience
As long as clients dare to imagine it, the team dares to build it—turning every bold concept into a real, touchable product.
Before the morning fog has cleared, the tea room in Room
A306 fills with the mellow aroma of Phoenix Dancong tea.
A client in a dark trench coat walks in—briefcase at his side like a
swordsman’s blade.
Three taps on the table—an unspoken signal in the wearable-tech world: a request for innovation.
“I’ve long heard the name of the ‘Four-Edge Crafters.’ Today, I’ve come personally with a special request.”
He lists the requirements:
1. Wireless binding with the main control box for seamless data transmission
2. Real-time bio-data collection: heart rate, SpO₂, blood pressure, respiratory rate, body temp, environmental temp, all uploaded to the main system
3. Type-C or USB interface
4. Electric stimulation function, strictly controlled: ≤600V, ≤5mA, safe but effective for warning
5. ≥6 hours continuous operation
6. Device size ≤ 40 × 32 × 15mm
7. Anti-tampering / anti-escape function: leaving the designated area triggers electric warning, without physical harm
After listening, Li Feifan smiles calmly, with the quiet confidence only engineers who have fought a thousand battles possess:
“These requirements are only the standard functions of our
basic version.
If you need something more advanced, we can handle that as well.”
In Shenzhen—the capital of hardware and innovation—such
watch technologies are mature.
98% of client requests are already covered by Geyan’s standard solution.
With Shenzhen’s strong supply chain and supportive policies
for cross-border business, Geyan Technology has expanded rapidly into overseas
markets.
Over the years, the team has customized:
· Muslim smartwatches tailored to religious lifestyle use
· Fashionable women’s smartwatches for Western markets
· Other niche, scenario-based wearable products
Every product precisely matches local habits and user needs—and continues to earn praise worldwide.

Founded in 2012, custom smartwatches have always been Geyan’s core business.
As the demand for health monitoring grows—and as electric-therapy and
physiotherapy features rise sharply—the smartwatch combining bio-sensing + electric massage has become the company’s new growth engine.
In the world of smart wearables, the “Four-Edge Crafters” of Geyan Technology are forging forward—technology as their blade, innovation as their spirit—writing a new legend of Shenzhen’s tech rise.