China + Thailand
Electronics manufacturing in China and Thailand
Two manufacturing bases in Jiangmen and Rayong, connected with engineering and sourcing coordination in Shenzhen. Compare the production environments, processes and locations for your next PCBA program.
Our network
Two factories. Connected engineering and sourcing.
| Location | Operating role | Address |
|---|---|---|
| Shenzhen · engineering & commercial coordination | Keep Best Group headquarters | 4/F, Building B, Tianyou Weixin, Fuqiao Third District, Fuhai Street, Bao’an District, Shenzhen, Guangdong, China |
| Jiangmen · manufacturing | Keep Best PCB Assembly (Guang Dong) Co., Ltd. | 5–8/F, Building 6, No. 319 Longxi Road, Jianghai District, Jiangmen, Guangdong, China |
| Rayong · manufacturing | Keep Best PCB Assembly (Thailand) Co., Ltd. | 7/47 Moo 4 Phana Nikhom, Nikhom Phatthana District, Rayong 21180, Thailand |
Jiangmen, China
From board assembly to finished products
The Jiangmen production base brings SMT, through-hole assembly, inspection, conformal coating and finished-product assembly into the China manufacturing route. The company profile identifies Yamaha YSM20R placement equipment and nitrogen reflow, alongside SPI, AOI and X-ray inspection.
Engineering teams agree the process sequence, inspection plan and functional-test requirements before production. For enclosure-based products, the scope can extend to assembly, configuration, final testing and packing.
Rayong, Thailand
A Thailand manufacturing route for international programs
Keep Best PCB Assembly (Thailand) Co., Ltd. operates at 7/47 Moo 4, Phana Nikhom, Rayong. The factory profile documents SMT and through-hole production, Yamaha YRM20 placement equipment, nitrogen reflow, SPI, AOI, X-ray and functional-test operations.
Production transfer starts with the released design, approved materials, fixtures, test software and acceptance criteria. Engineering and quality teams confirm the site-specific build package before a pilot or repeat order.
Process comparison
Match the manufacturing route to the work
Equipment and process descriptions are drawn from the company profiles; project configuration is agreed with the manufacturing team.
| Process | Jiangmen | Rayong | Confirm for your project |
|---|---|---|---|
| SMT assembly | Yamaha YSM20R placement; nitrogen reflow | Yamaha YRM20 placement; nitrogen reflow | BOM packages, board geometry and the thermal profile |
| Through-hole assembly | Wave and selective soldering; post-solder operations | Wave soldering and post-solder operations | Thermal sensitivity, connectors, fixtures and mixed assembly sequence |
| Inspection | SPI, AOI, X-ray and first-article inspection | SPI, AOI, X-ray and first-article inspection | Inspection method and acceptance criteria for the board |
| Functional test | FCT and project test fixtures | FCT and project test fixtures | Test software, loads, interfaces and unit/batch records |
| Protection & integration | Selective conformal coating and final assembly | Selective conformal coating and assembly support | Masking, coating material, enclosure and final product checks |
Factory photographs
See the locations behind the manufacturing route
Planning a visit
Bring your production questions to the factory team
Contact us to arrange a site discussion or supplier audit. Share the product category, anticipated quantities, required processes and preferred location so the right engineering and quality colleagues can prepare.
Can a program use both factories?
A transfer or second-site plan requires its own material, process and test qualification. We agree responsibilities and pilot acceptance before moving a released product.
Does manufacturing in Thailand determine tariff treatment?
Origin and tariff treatment depend on the product, materials, processing and destination rules. We provide manufacturing-route information for your trade advisers; the location alone does not determine the outcome.
Choose a production route
Match the factory to the product and the supply chain
| Project situation | What to compare | What to bring to the discussion |
|---|---|---|
| New product or changing design | Engineering access, prototype iterations and the path into a pilot | Design maturity, open DFM questions and target build dates |
| Established repeat product | Materials, process compatibility, test readiness and shipment requirements | Released BOM, process definition, forecasts and acceptance records |
| Additional manufacturing location | Equipment and fixture differences, training and qualification builds | Current work instructions, firmware, golden sample and test limits |
| Thailand manufacturing requirement | The product route, material sources, destination and customer qualification | Destination-market requirements, approved sources and audit needs |
Cross-site transfer
Carry the production definition with the product
- Freeze the release
Align the BOM, PCB files, assembly instructions and firmware revision.
- Prepare the process
Compare materials, equipment, fixtures and special process requirements.
- Verify the pilot
Use the agreed inspection and test limits to assess the first build.
- Release repeat builds
Close the findings and record the approved production configuration.
This is a transfer-planning framework. The work package, manufacturing location and qualification requirements are agreed for the individual product. Country of manufacture alone does not establish origin or tariff treatment.
Supplier qualification
Plan a factory visit or remote review
Tell us which site you want to review, your product category and the people joining the discussion. We can coordinate the information request with the appropriate manufacturing and engineering contacts.
- Jiangmen: SMT, through-hole and final-assembly manufacturing context
- Rayong: SMT, through-hole and Thailand qualification records
- Shenzhen: engineering, product-development and commercial coordination
Start a conversation
Discuss your manufacturing project
Tell us what you need to build or the question you would like to discuss. Our team will help define the next step.
We can sign a non-disclosure agreement before discussing sensitive designs. Your project information and files are handled confidentially.