Chongqing Rail Transit Line 4 West Extension Officially Opened - Huzhou Zeyong Steel Structure Builds Solid Support for Underground Corridors

On the morning of February 10, 2026, with the first train smoothly departing from Jiazhou Road Station, the West Extension of Chongqing Rail Transit Line 4 was officially put into operation. This underground corridor running through the core area of Liangjiang New Area was fully activated, not only adding an important artery to Chongqing's rail transit network, but also bringing the long-awaited "one-hour commuting circle" closer to reality for citizens. As a key project in Chongqing's urban transportation upgrading plan, the opening of this line not only optimizes the urban traffic layout, but also provides a strong driving force for regional economic integration and urban functional upgrading, which has attracted wide attention from the global infrastructure and steel structure industries.

The West Extension of Chongqing Rail Transit Line 4 starts from Panguilu Station in the west and ends at Min'an Avenue Station in the east, with a total length of 10.8 kilometers, all of which are underground lines, including 9 stations. The line connects multiple industrial parks, commercial centers and residential groups in Liangjiang New Area. After opening, it will greatly ease the pressure on regional ground traffic and provide an efficient and convenient choice for the daily travel of hundreds of thousands of citizens along the line. As a backbone east-west line in Chongqing's rail transit network, the opening of the West Extension of Line 4 further improves the layout of the urban rail transit network, which is of great significance for promoting regional economic integration and development and enhancing the quality of urban functions. For global B2B partners engaged in rail transit construction and steel structure supply, this project also demonstrates the broad market space and development potential of China's urban infrastructure construction.

In the construction process of this "underground artery", the overall steel structure project of Panguilu Station contracted by Zhejiang Zeyong Steel Structure Engineering Co., Ltd. has won unanimous praise from the owner unit, design party and supervision unit with its exquisite craftsmanship and excellent quality, becoming a major highlight of the project. As a professional steel structure enterprise with rich experience in infrastructure projects, Huzhou Zeyong has always focused on providing high-quality steel structure solutions for key projects, and its outstanding performance in this project has further demonstrated its professional strength and industry influence in the field of rail transit steel structure engineering.

Technological Tackling: Building a Benchmark Steel Structure Project

As the starting station of the West Extension of Line 4, the steel structure project of Panguilu Station is not only an important part of the main structure of the station, but also the key core to ensure the realization of station functions and safe operation. Faced with the complex construction conditions such as narrow construction space and adjacency to schools and residential areas, Zhejiang Zeyong Steel Structure Engineering Co., Ltd. set up a special team composed of senior engineers and technical backbones, and conducted multiple rounds of optimization and demonstration on the construction plan in advance, which fully reflects the company's rigorous attitude and professional capabilities in project management.

The team made full use of BIM technology to conduct 3D modeling of steel structure components, accurately simulated the component production and installation process, and predicted multiple technical difficulties such as stepped topographical features in advance. Key technological achievements in this project include:

• BIM-driven 3D modeling that reduced construction error risks and improved construction organization efficiency
• Advanced automated production lines ensuring component precision errors controlled at the millimeter level
• Innovative "zonal synchronous hoisting + overall precise docking" construction technology
• All steel structure installation tasks completed 15 days ahead of the original plan

Quality First: Building a Solid Foundation for Safe Operation

Zhejiang Zeyong Steel Structure Engineering Co., Ltd. has always put project quality and safety in the first place, and established a full-process quality management system from raw material procurement to finished product delivery. Quality assurance highlights include:

• All steel structure raw materials sourced from well-known domestic steel plants, with strict quality inspection before entering the site
• Each process supervised by special personnel to ensure products meet design requirements and national standards
• High anti-corrosion performance coatings with advanced spraying technology for underground humid environments
• Multiple special safety inspections organized — achieving zero safety accidents throughout the entire construction process

In view of the characteristics of humid and corrosion-prone environment of underground projects, the company specially selected coatings with high anti-corrosion performance and adopted advanced spraying technology to provide long-term protection for steel structure components. This anti-corrosion treatment effectively solves the problem of steel structure corrosion in underground environment, extends the service life of the structure, and reduces the later maintenance cost, which is one of the core advantages of steel structure in underground engineering applications.

Coordinated Operations: Demonstrating Corporate Responsibility and Mission

In the process of project construction, Zhejiang Zeyong Steel Structure Engineering Co., Ltd. has always adhered to the concept of "coordinated operations and win-win development", maintaining close communication and cooperation with the owner unit, design party, supervision unit and other participating units. Faced with various challenges in the construction process, the team took the initiative to act and coordinate actively, and timely solved several practical problems such as narrow construction site and difficult material transportation, ensuring that the project progress was not affected. This efficient coordination ability and responsible attitude have won high recognition from all participating units.

At the same time, the company gave full play to its own technical advantages, actively put forward suggestions for optimizing the project design plan and improving construction quality, and many reasonable suggestions were highly recognized by all parties. This spirit of putting the project overall situation first and daring to take responsibility not only shows the corporate style of Zhejiang Zeyong Steel Structure Engineering Co., Ltd., but also sets a good example for the industry. In the global infrastructure construction field, the ability of coordinated cooperation and active responsibility has become an important criterion for B2B partners to choose cooperative enterprises, and Huzhou Zeyong's performance in this project has further enhanced its competitiveness in the international market.

The official opening of the West Extension of Chongqing Rail Transit Line 4 is an important milestone in urban development and the result of the joint efforts of all participating units. Zhejiang Zeyong Steel Structure Engineering Co., Ltd., with its outstanding performance in the overall steel structure project of Panguilu Station, has once again proved its strong strength and professional level in the field of steel structure engineering. Compared with traditional concrete structures, steel structure has obvious advantages in construction efficiency, span capacity, seismic performance and environmental protection, which has become the preferred choice for more and more key infrastructure projects worldwide.

In the future, Zhejiang Zeyong Steel Structure Engineering Co., Ltd. will continue to uphold the corporate spirit of "striving for excellence and pursuing perfection", focus on the R&D and application of steel structure technology, continuously improve the quality of products and services, and contribute to more key projects at home and abroad. For global B2B partners who are engaged in rail transit construction, steel structure processing and related fields, Huzhou Zeyong is willing to establish long-term and stable cooperative relations, share development opportunities, and work together to promote the progress and development of the global infrastructure and steel structure industry. We welcome global partners to consult and cooperate, and create a win-win future together.

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