Contract Manufacturers in China: Expert-Reviewed List for Electronics, IoT & Electromechanical Products (2026 Update)

These days, it’s pretty easy to find article after article stating that manufacturing in China is “declining.” There is certainly some truth in that. Vietnam, Thailand, India, Mexico, and others have attracted significant investment, and they’re now very viable options for certain product categories and volumes.

However, for relatively complex electronic or electromechanical products, especially when time-to-market is critical and assembly requires a lot of labour and process control, South China is still one of the best places on earth to get things made. That’s why many consumer electronics, IoT devices, wearables, and other smart products are still designed and built here.

Note: This article was originally published in 2020 and is reviewed periodically. In this update, we checked whether the listed companies still appear active, whether their public positioning still matches the purpose of this list, and whether they are still relevant for buyers looking for contract manufacturers in China for electronics, IoT, wearables, medical devices, electromechanical products, and other relatively complex assemblies.

We have kept most of the original companies, but a few have been reframed. Some are better described as specialist manufacturers rather than general contract manufacturers. We have also added several options that may be relevant to buyers seeking more mature EMS, electromechanical, or multi-country manufacturing support.

This is still not a paid directory or sponsored list. Use it as a starting point for research, not as a substitute for proper supplier due diligence, audits, engineering review, sample evaluation, and clear manufacturing agreements.

Originally published: March 12, 2020. Last updated: June 2026.

How we selected these contract manufacturers

This list focuses on contract manufacturers that may be relevant for foreign buyers developing or producing relatively complex products in China.

When deciding which companies to include, we look at several factors:

• Type of work they actually do
  We focus on companies that can assemble products to the buyer’s specification, often combining electronics, PCBA, plastic parts, metal parts, firmware, testing, packaging, and supply chain management. Pure traders, wholesalers, and simple component suppliers are not the focus of this list.
• Experience with complex products
  Priority is given to factories that have experience with electronics, electromechanical products, smart devices, IoT, wearables, medical devices, industrial equipment, or similar products where process control matters.
• Engineering and NPI support
  Many buyers need more than “build to print” assembly. They need help with DFM, tooling, sample builds, pilot runs, testing, and transfer into stable production.
• Process control and quality systems
  We look for signs that the company has documented processes, appropriate quality systems, production controls, testing capability, and experience managing repeated production.
• Fit for foreign buyers
  Some Chinese factories are very capable but are mainly set up for domestic customers. This list focuses on manufacturers that appear more realistic for importers and overseas product companies.
• Current relevance
  Companies can change over time. Some grow into larger EMS providers. Some specialize. Some move part of their production to Vietnam, Thailand, Mexico, or elsewhere. Some no longer fit the original purpose of this list. That is why the list is reviewed and updated periodically.
• Supplier scale
  The scale categories below are approximate and based on public positioning, apparent manufacturing footprint, and the type of customers each company appears to serve. They should not be treated as verified staff counts. Always confirm the actual team size, production capacity, ownership structure, and facility setup during supplier due diligence.

The list of various contract manufacturers

Ordered roughly by size, here are some contract manufacturers in South China that you might like to consider for relatively complex electronic or electromechanical products.

Mid-sized foreign-buyer-friendly CMs

Agilian Technology (东莞市安集利安科技有限公司)

Agilian Technology is a contract manufacturer in Dongguan that focuses on relatively complex electronic and electromechanical products, including wearables, IoT devices, robotic products, pet tech, and other consumer electronics.

Agilian is a good fit for buyers who need support moving from design intent into stable production, especially where the product requires engineering review, supplier control, DFM, pilot runs, testing, and transparent supply chain management. In addition, they offer in-house PCBA and plastic injection molding.

• Supplier scale: Mid-sized CM
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: foreign buyers developing or transferring electronic/electromechanical products
• Location: Chang’an district, Dongguan city, Guangdong Province, PRC

Full disclosure: Agilian Technology is part of the same group of companies as Sofeast, of which I am CEO. It is included here because it fits the same criteria as the other manufacturers listed, but buyers should still apply their own due diligence before selecting any CM.

Seveco Global Limited  ( 鴻業環球有限公司 )

Seveco Global is an electronics-focused contract manufacturer with experience in thermostats, headsets, RFID readers, RF devices, and other connected products.

It may be relevant for buyers working on electronics, RF/wireless products, RFID, IoT, and other devices where product engineering, prototyping, box build, and fulfillment support may be needed.

• Supplier scale: Mid-sized CM
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: electronics, RF devices, RFID, IoT, connected products
• Location: Hong Kong / South China

Shenzhen Epower Hardware Industrial Co., Ltd (东莞意普五金实业有限公司)

EPower is a full-service contract manufacturer producing consumer electronics, electromechanical products, and other consumer goods. Its in-house capabilities include CNC machining, plastic injection molding, metal stamping, PCB assembly, and final mechanical and electronic assembly.

It may be a good fit for buyers whose products combine metal, plastic, and electronic parts, especially when they need DFM/DFMA support, prototyping, tooling, pilot runs, supply chain consolidation, and a controlled transition into mass production.

• Supplier scale: Mid-sized CM
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: consumer electronics, electromechanical products, and consumer goods requiring in-house metal and plastic manufacturing plus final assembly
• Location: Fenggang district, Dongguan city, Guangdong Province, PRC; additional manufacturing footprint in Thailand

UNI Precision Industrial Ltd (渝利電子制品有限公司 )

UNI Precision is a contract manufacturer that supports PCBA, box build, metal stamping, CNC punching, plastic molding, and injection molding.

It is relevant for buyers who need both electronics and mechanical manufacturing under one roof, especially where the product combines PCBA, plastic/metal enclosures, and final assembly.

• Supplier scale: Mid-sized CM
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: electronics, box build, PCBA plus mechanical assembly
• Location: Hengli district, Dongguan city, Guangdong Province, PRC

Shenzhen Kenvox Technology Co. Ltd (深圳市铠沃科技有限公司)

Kenvox is a custom manufacturing company with experience in OEM manufacturing, design and development, injection production, assembly, and quality control.

It may be relevant for buyers looking for support with electronic products, plastic parts, final assembly, and China/Vietnam manufacturing options.

• Supplier scale: Mid-sized CM
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: OEM manufacturing, electronics, plastic injection, assembly
• Location: Chang’an district, Dongguan city, Guangdong Province, PRC

Larger EMS / higher-volume options

Dongguan Wiseally Industrial co.,Ltd (东莞威雅利实业有限公司)

Wiseally is a larger electronics manufacturer in Dongguan. It has traditionally focused on PCBAs, modules, and finished electronic products. Its current public positioning is broader, describing electronics manufacturing, supply chain, contract manufacturing, clean room, and quality management services.

Wiseally may be a better fit for more mature electronics projects where the buyer needs a larger manufacturing partner rather than a small flexible CM.

• Supplier scale: Larger EMS-style manufacturer
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: electronics, modules, finished electronic products
• Location: Chang’an district, Dongguan city, Guangdong Province, PRC

Shenzhen Zowee Co., Ltd (深圳市卓翼智造有限公司)

Zowee is a larger Chinese manufacturer focused on smart manufacturing, IoT, mobile technology, telecoms, and connected hardware.

It may be relevant for larger buyers or more mature projects, but smaller foreign buyers should verify whether the company is set up to support their volume, communication needs, IP expectations, and project management requirements.

• Supplier scale: Larger group/Listed company
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: IoT, telecoms, mobile technology, connected electronics
• Location: Nanshan district, Shenzhen city, Guangdong Province, PRC

Shenzhen HyteraEMS Co., Ltd (深圳市海能达通信有限公司)

HyteraEMS is a larger electronics manufacturing services provider associated with Hytera Communications, with capabilities in PCBA, product assembly, testing, reliability testing, quality management, and supply chain support.

It may be relevant for established buyers producing complex communications, industrial, automotive, robotics, or rugged electronic products. Buyers affected by US export controls should carry out additional compliance checks before starting a project, as one of their divisions was recently placed on a blacklist by the US government.

• Supplier scale: Large group/Listed company
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: Communications equipment, industrial electronics, rugged devices, automotive modules, robotics
• Location: Longgang district, Shenzhen city, Guangdong Province, PRC

SUGA International Holdings Ltd / SUGA Technology Hong Kong Ltd (信佳技术香港有限公司)

SUGA is a larger electronics manufacturing group focused on professional audio, IoT products, lifestyle electronics, clean energy products, industrial automation, and other connected devices.

It may be relevant for established buyers that need engineering support, new product introduction, procurement, pilot production, mass production, supply chain management, and logistics from a mature EMS partner.

• Supplier scale: Large group/Listed company
• Mechanical products assembly: yes
• Electronic products assembly: yes
• Best fit: Professional audio, IoT, lifestyle electronics, clean energy, industrial automation
• Location: Qingxi district, Dongguan city, Guangdong Province, PRC

Specialist manufacturers

Dongguan Tutamen Metal Work Co., Ltd  (东莞彩美金属制品有限公司)

Tutamen appears to have moved toward a more specialist positioning. Rather than describing it as a general CM for a wide range of products, it is better positioned as a specialist manufacturer for advanced thermal, mechanical, and structural systems.

It may still be relevant for buyers with technically demanding mechanical or thermal requirements, but it is probably not the first choice for a buyer looking for a general electronics or IoT contract manufacturer.

• Supplier scale: Small / specialist
• Mechanical products assembly: yes
• Electronic products assembly: limited / project-dependent
• Best fit: specialist thermal, mechanical, and structural systems
• Location: Tangxia district, Dongguan city, Guangdong Province, PRC

MediConcepts Ltd (醫科創建有限公司)

MediConcepts is a specialist medical-device development and manufacturing company. It is relevant for buyers working on medical products that need engineering, verification and validation, tooling, production, and regulatory-aware development support.

It should be kept in the list, but clearly presented as a medical-device specialist rather than a general contract manufacturer.

• Supplier scale: Small / specialist
• Mechanical products assembly: yes
• Electronic products assembly: yes, depending on product
• Best fit: medical devices and medical product development
• Location: Hong Kong / Longgang district, Shenzhen city, Guangdong Province, PRC

RSP Technology Co., Ltd (深圳市瑞思博科技有限公司 )

RSP is relevant for buyers whose products include plastic parts, silicone keypads, membrane switches, and electromechanical assemblies.

It may not be the strongest example of a broad electronics CM, but it is a useful option for products where molded parts, user-interface components, silicone, plastic, and assembly are central to the product.

• Supplier scale: Small / specialist
• Mechanical products assembly: yes
• Electronic products assembly: yes, depending on the project
• Best fit: plastic parts, silicone keypads, membrane switches, electromechanical assemblies
• Location: Shenzhen / China, and US support

Dakoko Precision Components (Pinghu) Co.,Ltd. (帝柯精密零部件（平湖）有限公司)

Since 2008, German-owned Dakoko’s focus has been on complex turned parts made from steel, stainless steel, or special materials, and they provide contract manufacturing, as well as looking after assembly and logistics for customers, too.

• Supplier scale: Small / specialist
• Mechanical products assembly: yes
• Electronic products assembly: no
• Best fit: CNC machined metal parts (such as hydraulic components, union nuts and cutting rings, shafts, sleeves, and bushings)
• Location: Jiaxing City, Zhejiang Province, China

Advantages of dealing with a contract manufacturer directly

By working directly with a contract manufacturer in China (rather than only through trading companies or OEMs/ODMs), you can often gain several advantages:

• You, the buyer, generally owns the design and tools.
• You can often gain visibility over the supply chain.
• Better control of the situation as a whole – cost, quality, and timing.
• Switching from one CM to another is a relatively standard process.
• The CM generally accepts a certain amount of manufacturing-related liability (i.e. not related to design defects).

(We wrote about this in-depth in OEM, ODM, Contract Manufacturers: Choose your China Supplier Wisely, and we discussed your Chinese supplier options in this episode of our podcast: What are your 4 options when sourcing suppliers in China? [Podcast])

What to think about before you contact any of these CMs

A few important points before contacting any of these manufacturers:

• Do not assume the biggest CM is the best fit.
  Large EMS companies often prefer mature buyers, stable forecasts, and higher volumes. Smaller or mid-sized CMs may be more flexible, but they may also need more guidance and closer management.
• Separate PCBA suppliers from full product CMs.
  A PCBA supplier may be excellent at board assembly but weak at final product assembly, packaging, testing, documentation, supplier management, or NPI. If you need a finished product, make sure the supplier can manage the complete process.
• Check whether the CM is suitable for your stage.
  A prototype-stage project, an NPI-stage project, and a production-transfer project need different types of support.
• Verify everything.
  Before committing, check the company registration, visit or audit the factory, review their quality systems, inspect samples, run a pilot build, and clarify IP, tooling ownership, payment terms, change control, and responsibility for defects.
• Consider China plus one, not China versus everywhere else.
  For complex electronics and electromechanical products, China is often still the best place to start. However, some buyers may also want Vietnam, Thailand, Mexico, India, or another location as a second source once the product and process are stable.

How about help to design your new product?

If it’s too soon for you to work with a contract manufacturer yet (for example, your concept isn’t frozen or your design files aren’t ready), your priority might be product design and engineering rather than production. In that case, these resources will help you prepare before you approach any CM:

• 6 Tips To Nail Your Hardware Product’s Concept BEFORE Engaging A Design House
• 18 Electronic Product Design Firms For ‘Made-in-China’ Products

Do you need help to source the right contract manufacturers in China?

If you’d like expert help to shortlist and qualify contract manufacturers for your specific project, my team and I can assist. Tell us more about your product, expected order quantities, target launch date, and any particular requirements (e.g. certifications, country of import) by filling the contact form, and we’ll come back to you with suggestions.

FAQs about contract manufacturers in China

1. What is a contract manufacturer in China?
   A contract manufacturer (CM) is a factory that assembles your product to your specification using parts and materials that they purchase (often from their own approved suppliers). You typically own the design and the tooling, and they are responsible for setting up the processes, producing, and testing the goods according to an agreed quality standard.
2. When does it make sense to use a Chinese contract manufacturer instead of an OEM or ODM?
   A CM is usually a good fit when you own or control the product design and don’t want the factory to sell it to others, you need relatively high volumes or repeated batches, and you want more visibility and control over the supply chain, testing, and quality systems than a typical OEM/ODM will offer.
3. Are these Chinese contract manufacturers suitable for small startups?
   Some are, and some are not. Large CMs tend to prefer higher, more stable volumes and organized customers; smaller or mid-sized CMs may be more flexible but have limits on how low they can go on quantities.
4. What types of products are best suited to Chinese contract manufacturers?
   China is particularly strong for consumer electronics and IoT devices, wearables, fitness and pet tech, and products that combine PCBA, software/firmware, and plastic/metal enclosures, especially when you need to move from prototype to mass production relatively quickly.
5. How should I vet a Chinese contract manufacturer before placing an order?
   At a minimum, do basic company verification, audit the factory (on-site or remote), review a sample or pilot run with clear acceptance criteria, and negotiate a manufacturing agreement covering quality, IP, tooling ownership, and payment terms.
6. Can I work with more than one contract manufacturer in China for the same product?
   Yes, many buyers eventually set up dual sourcing: two CMs that can both produce the same product, which can reduce risk and increase leverage, but requires strong document control, testing, and change management. In most cases, one of the CMs is in another country for risk reduction.

A note on this post…

This list is reviewed periodically. We may remove manufacturers that close, pivot away from contract manufacturing, or no longer match these criteria, and add a small number of new CMs that we have vetted and that we believe are relevant to our readers.

For full transparency, note that Agilian Technology is part of the same group of companies as this blog’s author. It is included here because it fits the same criteria as the others (and its strengths and limitations are described as objectively as possible), but you should still apply your own due diligence to any factory on this list.