Zone 01 · R&D labs
Engineering on site
EE, firmware, optical and acoustic validation benches, including optical measurement, a shielded RF room and prototyping equipment.
CYNRIN FACTORY · SHENZHEN
One factory in Shenzhen — engineering above the production floor
The CYNRIN factory is a single 20,000 m² site in Longgang, Shenzhen, operated by Shenzhen Kingring Technology Co., Ltd. R&D labs, SMT and assembly lines, the aging room, quality inspection and the export warehouse share one address, so a prototype revision can reach the line the same day.
- 20,000 m² co-located R&D and manufacturing facility
- Six owned production stages: SMT through packing
- On-site optical, RF shielded and acoustic test labs
- Open to on-site audits and live video walk-throughs
Longgang · Shenzhen · Guangdong · China
FACILITY FACTS
The site, the operator, the scope
A factory is a physical place with a legal operator — these are stated separately so the record matches your supplier file.
| Field | Detail |
|---|---|
| Operator (legal entity) | Shenzhen Kingring Technology Co., Ltd. |
| Brand operated on site | CYNRIN smart glasses (OEM / ODM) |
| Location | Longgang District, Shenzhen, Guangdong, China |
| Facility size | 20,000 m², single site |
| Functions on site | R&D labs · SMT · assembly · aging · quality inspection · packing · warehouse |
| Production stages owned | 6 — SMT, assembly, functional verification, aging, final inspection, packing |
| People on site | 300+ employees, including 50+ R&D / engineering professionals |
| Operating since | 2018 |
| Visitor policy | On-site audits and real-time video walk-throughs for qualified buyers by appointment |
| Full street address | Provided with visit logistics and in the company profile pack under NDA |
INSIDE THE FACILITY
What you walk through on an audit
Six functional zones on one floor plate, in the same sequence a product travels.
Zone 02 · SMT
Surface-mount assembly
Automated pick-and-place, solder and AOI screening feed verified PCBAs into assembly, with reel-level material traceability.
Zone 03 · Assembly
Product assembly
Electronics, frame and temple assembly at controlled workstations with magnified inspection and in-process (IPQC) checks.
Zone 04 · Aging
Burn-in and reliability
Powered aging racks and environmental/mechanical verification screen early-life failures before outgoing inspection.
Zone 05 · Test labs
Optical, RF and acoustic testing
Lens transmission/UV400 benches, BLE antenna measurement in the shielded chamber and acoustic fixtures for speaker and microphone tuning.
Zone 06 · Packing & warehouse
Packing and finished goods
Branded packing, OQC release, carton marking and finished-goods storage ready for export consolidation.
EQUIPMENT
Equipment categories and what each one proves
We list equipment categories and their purpose rather than publishing counts that go out of date. Line counts, model numbers and equipment age are confirmed on the audit walk-through and in the facility datasheet.
| Equipment / area | Purpose | Evidence on audit |
|---|---|---|
| Automated SMT lines (pick-and-place, solder, screen print) | Place and solder mainboard and flex PCB components | Live run, machine HMI, line routing sheet |
| AOI (automated optical inspection) | Screen solder and placement defects post-SMT | AOI program and recent defect logs |
| In-circuit / functional test jigs | Verify PCBA electrical function and programming | Jig demonstration, test yield records |
| Optical measurement benches | Lens transmittance, UV400, polarization and alignment | Live measurement against a sample |
| Shielded RF chamber | BLE antenna and radio performance verification | Chamber walk-through, test setup |
| Acoustic test fixtures (HATS-type) | Speaker/microphone acoustic performance | Fixture and measurement software demo |
| Burn-in aging racks | Powered aging to screen infant-mortality failures | Aging plan and rack capacity on site |
| Environmental / mechanical test setups | Temperature, humidity and mechanical reliability per plan | Test plan and recent report samples |
| Assembly workstations with magnified inspection | Controlled manual assembly stages with IPQC | Workstation audit and routing cards |
| Packing lines and finished-goods warehouse | Branded packing, OQC release, carton and pallet handling | Packing audit, warehouse walk-through |
Specialized processes such as injection molding, mold making and lens blank production run at qualified partner facilities — see the honest in-house / partner matrix on the manufacturer page.
PRODUCTION PATH
How a unit moves through the building
The six owned stages, with inspection gates between them. Full process detail lives on the manufacturing operations page.
1. SMT
Boards are placed, soldered and AOI-screened from traceable reels.
2. Assembly
PCBAs, batteries, speakers, hinges and frames meet at controlled workstations.
3. Verification
Functional, optical, RF and acoustic checks against the approved configuration.
4. Aging
Powered burn-in and environmental/mechanical reliability sampling.
5. Final inspection
OQC against the agreed AQL, including cosmetic and packaging checks.
6. Packing
Branded packing, carton marking and finished-goods handover to logistics.
See manufacturing operations in depth → · See IQC/IPQC/OQC quality controls →
CAPACITY
How we talk about output
Capacity for smart glasses is configuration-dependent: a camera model with OTA provisioning does not consume the same line time as a standard audio SKU. We therefore do not publish a single impressive-sounding monthly number on the website — quoted capacity is always given per approved configuration, with assumptions for shifts, line allocation and test time stated in writing.
For your RFQ, you receive a capacity statement with: the target SKU, theoretical line capacity, realistic contracted capacity, current load in the booking window and the lead-time buffer. Existing customers can also review output against prior purchase orders.
- Capacity quoted per configuration, never as a generic headline
- Theoretical vs. realistic contracted output separated
- Current booking-window load disclosed before commitment
WAREHOUSE & EXPORT
From OQC release to container
Incoming and line-side material
IQC-cleared components are stored segregated by status (pending, accepted, rejected) and fed to lines with reel-level traceability.
Finished goods
OQC-released units move to branded packing and finished-goods racking, labelled and ready for customer-specific carton and pallet configuration.
Export coordination
Licensed forwarders handle booking, customs documentation and Incoterms delivery (FOB/CIF/DAP supported). Shipping terms and lead times are confirmed per order.
FACTORY AUDITS
See the current facility, not just a page about it
Photographs on this page are representative visuals of the working environment. For vendor approval we encourage stronger evidence — current, dated and time-stamped.
01
On-site audit
Qualified buyers audit the Longgang facility in person: lines, labs, aging room, warehouse and quality records. Appointments via [email protected].
02
Live video walk-through
A real-time video tour showing requested stations, equipment HMI screens, current work orders and date evidence — recorded for your compliance file on request.
03
Facility datasheet
Line counts, equipment lists, floor plan, shift structure and capacity statement issued per program under NDA.
FACTORY FAQ
Visiting, evidence and capacity
Where exactly is the CYNRIN factory?
Longgang District, Shenzhen, Guangdong, China — a single 20,000 m² co-located R&D and manufacturing site operated by Shenzhen Kingring Technology Co., Ltd. The full street address is shared with visit logistics and in the company profile pack under NDA.
Can I visit the factory before placing an order?
Yes. Qualified buyers can visit on site or join a live video walk-through. Use the contact page or [email protected] to arrange it; we send audit questionnaires and the facility datasheet beforehand so the visit is efficient.
Do you show real factory photos on this page?
The images here are representative professional visuals of the working environment, not audit evidence. For vendor approval we provide current, dated, time-stamped photos and video during a live walk-through, plus an in-person audit option — deliberately stronger evidence than website imagery.
What is your monthly production capacity?
Capacity is quoted per approved product configuration rather than as one generic number, because camera and audio models consume different line and test time. Your RFQ response includes theoretical and realistic contracted capacity plus current booking-window load.
Are SMT and assembly really in the same building as R&D?
Yes. R&D labs, SMT, assembly, aging, inspection, packing and the warehouse share the Longgang site. This co-location is the core reason engineering changes can be validated on hardware quickly.
What is not inside the factory?
Injection molding, mold making, lens blank production, third-party certification testing and export freight are handled by qualified external partners and are disclosed as such — never presented as in-house.
Schedule a factory walk-through
Tell us your time zone and audit checklist — we will arrange an on-site visit or a live video tour with the engineers who run each zone.