On January 22, 2026, at the modern factory of Ningbo Yijun Technology Co., Ltd., located at No. 299 Lishi Road, Ditang Street, Yuyao City, a batch of newly produced screws and nuts was undergoing rigorous quality inspection. This order came from a European client, and thanks to the infrared detection technology of its high-precision screening machine, Ningbo Yijun Technology successfully intercepted defective products, winning high-end recognition and praise from the client for its superior quality.
The core of this inspection was infrared detection technology. The high-precision screening machine introduced by Ningbo Yijun Technology is equipped with advanced infrared sensors, capable of scanning the surface of screws and nuts with micron-level precision. During the inspection process, the equipment quickly identifies material defects, dimensional deviations, and surface scratches through infrared spectral analysis. For example, the thread depth deviation of a batch of screws was only 0.02 millimeters, which is difficult to detect with traditional manual inspection. However, the infrared system can complete data acquisition and mark it as defective within 0.1 seconds, ensuring that every product meets the stringent tolerance standards of European customers.
“The advantage of infrared inspection lies in non-contact scanning and real-time data analysis,” said the Quality Director of Ningbo Yijun Technology. “Compared to traditional visual inspection, this technology reduces the defective product omission rate from 3% to 0.05%, while increasing inspection efficiency by 5 times, fully meeting the delivery cycle requirements of the European market.”
After visiting the inspection process, European customer representatives highly praised it: “Ningbo Yijun Technology’s inspection system demonstrates the precision level of Chinese manufacturing. Infrared technology not only ensures zero defects in products, but also allows us to monitor production progress in real time through a digital traceability system. This transparency is extremely rare in European and American supply chains.”
It is understood that this order includes 500,000 screws and nuts of 12 specifications, used in the assembly of battery packs for new energy vehicles in Europe. The client emphasized that the inspection reports provided by Ningbo Yijun Technology meticulously recorded the infrared spectrum and dimensional data of each product, providing crucial information for optimizing subsequent assembly processes.
Founded in October 2025, Ningbo Yijun Technology, though a newcomer to the industry, has rapidly risen to prominence thanks to its technological prowess. Initially accumulating experience through imported German infrared inspection equipment, the company achieved independent development of its core algorithms by early 2026. Its screening machines, equipped with a PLC control system, can automatically adjust inspection parameters based on different product characteristics, for example, improving the roundness detection accuracy of nut inner holes from 0.1 mm to 0.03 mm, reaching the same level as leading international brands.
"We invest 15% of our annual revenue in R&D and currently hold three patents related to infrared inspection," revealed Hou Hui, the company's founder. "Our next plan is to integrate AI visual recognition with infrared spectral analysis to build a more intelligent defect prediction model."
The case of Ningbo Yijun Technology reflects the transformation trend of Ningbo's manufacturing industry. As an important fastener production base in China, Ningbo has over 2,000 related enterprises, but the high-end market has long been monopolized by German and Japanese companies. Ningbo Yijun Technology has entered the new energy vehicle and aerospace industries through high-precision technologies such as infrared detection. In 2026, it partnered with three European Tier 1 suppliers, achieving a 200% year-on-year increase in exports.
"Ningbo manufacturing is shifting from 'price competition' to 'value competition'," noted a relevant official from the Ningbo Municipal Bureau of Economy and Information Technology. "Companies like Yijun Technology, which are reshaping the supply chain through technological innovation, will become a key force in Ningbo's efforts to build a global intelligent manufacturing innovation hub."
At this moment, on Ningbo Yijun Technology's inspection line, another batch of screws and nuts, destined for Germany, is passing through the infrared scanning area. With each flash of the beam, the precision genes of Chinese intelligent manufacturing are crossing oceans, etching a new coordinate in the global industrial chain.
