Rail Transit Digital Supply Chain Platform
Flexible supply chains for high turnover and low inventory.
Yunshang Rail Transit (www.yunshang.link) is a one-stop supply service platform for rail transit operational materials. By leveraging standardization, product development, supply chain management, and platform-based operations—driven by information technology and digitalization—we are exploring comprehensive zero-inventory solutions for rail transit materials. Building upon the procurement requirements and existing inventory of project owners, and integrating the supply capabilities of suppliers, we utilize digital tools—including micro-warehouses, cloud warehouses, and online marketplaces—to construct a flexible supply chain ecosystem. Under mutually agreed objectives, we establish procurement and storage framework agreements to achieve high turnover rates, low inventory levels, and even zero inventory.
Solution
Yunshang Rail Transit http://www.yunshang.link/ is an independent, professional third-party contract-based trading platform offering end-to-end transaction services. It leverages an extensive network of supplier resources to enable procurement entities to complete the entire online collaborative process—including contract ordering, order execution and delivery, goods receipt and inspection, payment and settlement, and after-sales service—between procurement parties and suppliers. As a specialized third-party trading platform for the rail transit industry, we are committed to breaking down information barriers, optimizing existing asset utilization, reducing procurement costs, and enhancing transaction efficiency. Through a transparent and open digital ecosystem, we create tangible value for all stakeholders across the industry chain, ensuring that every transaction is more hassle-free, cost-effective, and trustworthy.
Why Choose Us
End-to-end supply-demand coordination and a closed-loop transaction process
The platform enables end-to-end online collaboration across the entire procurement lifecycle—including contract ordering, order execution, delivery and acceptance, payment and settlement, and after-sales service. Buyers and suppliers can complete the full transaction cycle—from ordering to after-sales support—on a single platform, with every stage digitally recorded, ensuring transparent and traceable processes, thereby significantly enhancing collaborative efficiency between both parties.
An independent third party—impartial and trustworthy
The platform operates independently of both buyers and sellers, providing foundational support services—including supplier onboarding review, product listing and removal approval, and platform functionality maintenance. As an impartial third party, it offers transaction guarantees and dispute mediation services, building a bridge of trust between suppliers and buyers to make every transaction smoother and more reliable.
Aggregating vast resources to reduce costs and boost efficiency
The platform hosts an extensive network of suppliers, offering products across 22 major categories and over a thousand sub-categories of rail transit materials. By breaking down information barriers and optimizing existing asset utilization, the platform enables procurement entities to rapidly match high-quality suppliers, thereby effectively reducing procurement costs and enhancing transaction efficiency.
Digital Transformation-Driven: Zero-Inventory Exploration
Driven by information technology and digitalization, the platform leverages digital capabilities—including micro-warehouses, cloud warehouses, and online marketplaces—to build a flexible supply chain ecosystem. Based on mutually agreed objectives, both parties have signed a procurement and warehousing framework agreement, thereby facilitating the achievement of high inventory turnover, low inventory levels, and even zero inventory.
About Us
Founded in 2018, DITT applies AI visual intelligence to rail transit. Built on our own visual perception algorithms, intelligent hardware and O&M systems, we deliver a full inspection portfolio spanning onboard and wayside applications, now serving 20+ rail transit systems across China.

Together with our subsidiaries — Zhonggang Maintenance, Zhongshu Laser and Yunshang Urban Rail — we are moving rail transit O&M toward predictive maintenance and full-lifecycle management.
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Related Products
Leveraging the powerful capabilities of the Internet of Things (IoT), this system enables comprehensive big data management for urban rail transit material assets, including: material warehousing and production process management; warehouse inbound/outbound alert management for work teams; production material quota-based inventory safety alert management; statistical data management for material consumption quotas; and a complete end-to-end workflow—from material asset planning, procurement, acceptance, storage, and distribution, to work-team material requisition, storage, and withdrawal—along with information entry, query, and statistical analysis. The system also supports the configuration of warehouse inbound/outbound alerts, material quota safety alerts, and statistical analysis of material consumption quotas, thereby establishing a unified big data-driven warehousing and operational platform for material management. All operational workflows incorporate an electronic signature mechanism, and the platform supports file scanning and upload, image capture and upload, as well as automatic linkage to corresponding reports, achieving paperless material management operations.
The e-Car Network Procurement Cloud Platform is a B2B electronic procurement platform dedicated to the rail transit industry, operated by Yunshang City Rail. It provides end-to-end online management capabilities spanning from supplier sourcing, bidding and tendering, order processing, contract management, payment, to logistics, supporting diverse procurement modes—including price inquiries and comparative analysis as well as contract procurement. The platform features built-in oversight functions to ensure full transparency and accountability. Its product catalog covers 22 major categories—including locomotives and rolling stock, and communication and signaling systems—comprising over 240,000 product variants, and connects more than 20,000 suppliers, having already served over 50 metro operators across China. Additionally, the platform offers complementary services such as supply chain finance and cloud-based warehousing and logistics solutions, helping enterprises reduce costs, enhance operational efficiency, and achieve digital transformation and upgrading in their procurement processes.
The intelligent AI assistant for material management systems serves as the "smart brain" of the material management domain. By operating as a lightweight plugin, it empowers existing systems, integrating end-to-end data across the entire workflow—from requirements → procurement → inventory → consumption—thereby transforming material management from "passive response" to "proactive decision-making."
Latest News
On September 18, the three-day "2025 China International Urban Rail Transit Exhibition" (MetroTrans 2025) officially opened at the CRCC Qingdao World Expo City.
On August 30, 2025, Changzhou Metro Group held the "Changzhou Metro Line 1 EMU Intelligent Inspection System Expert Review Meeting" at the Baizhang Depot.
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