Product Engineering*

Transformed from factory to sourcing company since 2010, the most obvious advantage of Ruizhi compared with other sourcing companies is that we have the ability to provide product engineering services. That means, we can not only help you with sourcing, but we can also turn ideas into reality with our production engineering services. Most sourcing companies know how to source, that’s not strange, but a truly professional sourcing company needs to know how to produce.

Here comes a good idea about a product that hasn’t been shown in the market or even hasn’t been produced. How can an inexperienced client and a sourcing team without product engineering services produce it? Well, with the help of Ruizhi sourcing company, all your ideas can be lit up. We comprehend the factory process better than the client and comprehend the client's needs better than the factory.

Get your ideas - understand your need - design the drawings - discuss the details - build the mold - produce the sample, confirm the final version, and then put into production. Factory inspections, technology vertification, quality testing, sample delivery, cost analysis, logistics, and after-sales service, we treat every process attentively. 

The end to end flow is as below:


Customer’s Creative Drawing

Usually, product engineering services are based on clients’ ideas and concepts, to be more specific, drawings. 

As the core of product engineering, the importance of drawing is self-evident. 

Ruizhi collects clients’ drawings, product IDs, or sketches to comprehend our client’s thoughts and creativity better. 


Creative Drawing

3D Mechanical design

After the drawings were discussed by Ruizhi and clients, we will begin to conduct the 3D modeling. The 3D modeling will design according to manuscripts, in the meantime, the details would be negotiated over and over again until both sides feel satisfactory. 

3D Mechanical design


In digital product engineering services, prototyping is also a vital part. Proofing needs to be done based on the material of the components and parts. Then we will assemble the samples, find out issues of the samples, and communicate with client for in-depth adjustments. We will proof and proof again until the clients are satisfied. 


Details Confirmation

In order to achieve the demands from samples to mass production, we need to evaluate the performance matching between product components, the coordination rationality of space design, the structural relationship of each part of the whole system, and perform continuous adjustment of sample data and assemble so as to achieve final mass production requirements.

Details Confirmation

Pilot Run

After the sample is confirmed, small batch trial production can be arranged. The overall production process, sampling inspection, and quality experiment can be checked whether it can meet the mass production through trial production.

Pilot Run

Production Process Control

Through small batch trial production, engineers begin to make each process operating procedures and quality sampling test procedures.

Production Process Control

Sourcing the best partners for different components

Just like Indiegogo and Kickstarter Ruizhi is committed to helping clients ‘touch dreams’ with our comprehensive product engineering services. And a good partner is necessary for satisfactory cooperation. The strict criteria will be used to integrate the most suitable suppliers for each component or raw material. 

Sourcing the best partners

Price optimization

The final step of product engineering services is price optimizatioin. A comprehensive analysis will be done of all costs, including material cost, loss cost, packaging cost, transportation cost of each component, all kinds of taxes that need to be charged, etc. Strive to enable our clients to customize the most suitable product at the most competitive price.  

Price optimization

Key areas RUIZHI specializes in

Product engineering related technology: product structure engineering, customization and modification of mechanical equipment, surface treatment technology, electronic related
Product material:
Product Structure Engineering:

Mold development:


Stamping Dies / Die casting / Powder metallurgy / Casting dies / Drawing dies, etc.


Ordinary horizontal injection molding / Vertical injection molding / Blow molding, etc


Knife Die / Stamping Die / Paste Die

Structural connection:

Mechanical structure design, gear chain, gear link, slider link etc.


The structural parts assembly and production line is reasonably arranged.


 Circuit test, performance test, mechanical structure test, practicality test, transportation simulation test.

Customized modification of mechanical equipment:


It is mainly based on factory standard machines. It can be customized according to customer needs (special functions or special structures) by modifying drawings. There are many successful cases in hardware or software customization and modification.

Surface treatment:

Surface treatment including:

Painting, electroplating, oxidation, electrophoresis, laser marking, silk screen printing, pad printing, decals, thermal transfer printing, IML/IMD, dye diffusion process and other special surface treatment processes


Electronics including:

Circuit design, PCB board production, incoming 

control of electronic components, and 

accumulated rich electronic supplier resources, 

fully support the realization and mass production 

requirements of customized electronic products.

Technical expert team

Tiger Wu- Ruizhi Sourcing
Tiger Wu
Product structure engineering expert
More than 8 years of factory management and production experience, proficient in mold development, structural parts connection, reasonable arrangement of structural parts assembly production lines, familiar with product development process.
Jacky Lu
Surface processing expert
10 years experience in mechanical watch production. 15 years of experience in the process of watch structural parts, proficient in a certain surface treatment field such as spraying/PVD/optical coating/paint/ink/IMT/IML/UV transfer printing, familiar with plastic injection molds.
Ross Liu
Mechanical expert
Engineering design or packaging majors. Proficient in the R&D and design of non-standard automation equipment, familiar with the transformation and maintenance of old machine tools. Including electrical, mechanical, hydraulic, pneumatic.
Jack Yang
Electronic digital expert
More than 5 years working experience in electronic product development; proficient in basic knowledge of electronics, machinery, software related to consumer digital embedded products and engineering quality management knowledge of mass-produced products; strong project management ability and quality analysis ability.