Flexible Connection, Solid Protection! Chongqing Yonggui Gangway System Helps Shijiazhuang Metro Line 4's First Train Roll Off the Production Line with Pride

On September 1, 2026, the first train of Shijiazhuang Metro Line 4 Phase I project successfully rolled off the production line at the final assembly workshop of CRRC Shijiazhuang Rail Transit Equipment Co., Ltd. As the supplier of the gangway system—the "invisible joint" of the train—Chongqing Yonggui Transportation Equipment Co., Ltd. has contributed its proven product strength to this new artery in the heart of Hebei Province.

Locally Built, Sleeker Violet Train

The newly launched Shijiazhuang Metro Line 4 train is an 80 km/h Type B aluminum-alloy metro train, featuring an industrial gray body with violet decorative accents, smooth rounded lines, and a minimalist, dynamic design. Compared with the Type A trains used on existing lines, the Type B train is 20 cm narrower in body width—sleeker and offering more stable operation.

The train adopts an aluminum-alloy structure that is both sturdy and lightweight, with a streamlined nose that effectively reduces aerodynamic drag. With a standard passenger capacity of 1,260 in six-car formation and 828 in four-car formation, a total of 22 trains are planned for production.

More Than Comfort and Intelligence—Safety and Reliability Come First

According to public reports, the Shijiazhuang Metro Line 4 train features a number of highlights:

Greater Comfort — Through systematic noise insulation and reduction treatment, the laminated glass of the side windows uses argon instead of ordinary air in the interlayer, effectively adding an invisible soundproofing buffer. When running at 80 km/h on surface sections, interior noise is kept to no more than 73 decibels. The train is also equipped with an air purification system that filters dust and removes odors.

Greater Intelligence — The Line 4 train is equipped with a full-network intelligent operation and maintenance system, making it one of Shijiazhuang's first batch of digitally smart metro trains. The on-board display screens provide richer information, including not only station names but also transfer directions and surrounding landmarks. Real-time operating data is uploaded to the back-end system, allowing maintenance personnel to monitor vehicle conditions in advance.

Greater Safety — The car body's protective performance has been further optimized, with improved impact resistance. A full suite of intelligent monitoring equipment enables real-time self-diagnostics for all critical components, with instant alerts in case of any detected anomalies.

Flexible "Joints," Solid Protection

As the critical flexible connection between train carriages, the gangway system directly determines the train's curve-negotiating capability and passenger safety. The Type B metro gangway system custom-developed by Chongqing Yonggui for Shijiazhuang Metro Line 4 offers the following core advantages:

Strong Adaptability — The product is specifically designed for the Type B metro platform, with a passage width that meets operational requirements and excellent sound insulation performance (above 36 dB). Chongqing Yonggui has long supplied to major OEMs including CRRC Changchun, CRRC Sifang, CRRC Puzhen, and CRRC Zhuzhou, and has previously won gangway-related contracts for Shijiazhuang metro projects.

Technical Excellence — The company holds authoritative certifications including IRIS (ISO/TS22163) and EN15085-CL1 international welding quality system, and is recognized as a National High-Tech Enterprise and a "Specialized and Sophisticated" enterprise. The team continues to innovate and holds multiple gangway-related patents, such as "A Type B Train Gangway Buckle Structure" and "A Train Gangway Folding Bellows Device."

Full-Process Quality Assurance — The company implements whole-process inspection during production to ensure products meet international standards and train application requirements. From R&D and design to delivery and after-sales service, we provide customers with customized, complete gangway system solutions.

Connecting Urban Arteries, Yonggui Continues to Empower

From supporting the nation's first flexible-consist train project on Chongqing Rail Transit Line 24 to safeguarding the launch of Shijiazhuang Metro Line 4's first train, Chongqing Yonggui has remained deeply committed to the rail transit gangway sector, quietly protecting the smooth operation of major urban transport corridors with reliable connection technology.

With the orderly production and delivery of the remaining 21 trains for Shijiazhuang Metro Line 4, Chongqing Yonggui's gangway systems will accompany this violet artery as it travels through the city's underground spaces, providing safe, comfortable, and green travel experiences for the people of Shijiazhuang.

Chongqing Yonggui Transportation Equipment Co., Ltd. — dedicated to the R&D, manufacturing, sales, and service of train gangway systems, providing high-quality gangway solutions for metro trains, high-speed EMUs, suburban trains, monorails, and maglev trains.

Image and Text Sources: Arts Railway Transit Exhibition, HR Sanxiu, Hebei Daily, Wireless Shijiazhuang. 

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