Home About Us Products Solutions News Algorithm Demo
Subsidiaries
中文
Comprehensive EMU & Electromechanical Overhaul Services
End-to-end overhaul management from inspection and repair to verification and traceability.
To meet the deep maintenance requirements of rail transit passenger cars and their electromechanical equipment, we integrate core vehicle manufacturing technologies with MTR's refined asset management expertise to deliver full-vehicle frame overhauls, component-level specialized repairs, and multi-system collaborative commissioning services. Leveraging our quality management systems, expert technical teams, intelligent maintenance equipment, and original equipment manufacturer (OEM) supply chains, we enable end-to-end management encompassing inspection, repair, validation, and traceability, thereby supporting rigorous repair quality control and optimization of full-lifecycle costs.
Get Quote Now
Solution
To meet the requirements for complete vehicle frame overhauls, component repairs, and multi-system commissioning, we integrate vehicle manufacturing technologies, asset management expertise, and standardized quality systems to deploy expert teams and intelligent maintenance equipment for in-depth maintenance services. By implementing end-to-end digital documentation, spare parts life prediction, and direct access to OEM resources, we ensure optimal maintenance quality, efficient cycle management, and minimized total lifecycle costs.
Overall Technical Parameters
Technical Specifications Service Capability Metrics
Service Scope Full-vehicle overhaul (bogie & major overhaul), component-level professional repair, multi-system collaborative commissioning
Technical Capability Examples Bogie reconditioning, traction system remanufacturing
Management Systems ISO 22163, ISO 55001
Quality Management Chain Inspection – repair – verification – traceability, with digital records
Core Team Experience Average industry experience of over 12 years
Actual Vehicle Cases Over 700 vehicles in bogie & major overhaul projects
Cost Optimization Lifecycle maintenance cost reduced by 25%–35%
Supply Efficiency Waiting time for missing parts reduced to within 24 hours
Working Principle
By identifying precise maintenance requirements through inspection, we integrate vehicle manufacturing technology with asset management expertise to carry out complete vehicle frame overhauls, component repairs, and multi-system collaborative commissioning. Leveraging auxiliary equipment—such as intelligent rust removal and cleaning systems—we conduct operations while maintaining digital records of inspection, repair, validation, and traceability processes, thereby ensuring rigorous quality control across critical manufacturing stages.
Why Choose Us
Integration of Technology and Quality
By integrating CRRC's core vehicle manufacturing technologies with MTR's asset management expertise, we provide comprehensive services encompassing complete vehicle frame overhauls, component repairs, and multi-system collaborative commissioning.
Full-process quality control
Achieve ISO 22163 and ISO 55001 management system certifications by implementing end-to-end digital traceability across testing, maintenance, validation, and traceability processes.
Experts and Intelligent Equipment
The core members of the composite team have an average of over 12 years of professional experience, have handled over 700 actual vehicle cases in frame overhaul projects, and are equipped with intelligent laser rust removal and intelligent cleaning equipment.
Supply Chain and Cost Optimization
By adopting a fixed-rate model supplemented with optional value-added options, combined with spare parts life prediction and direct supply from original equipment manufacturers, we optimize both maintenance costs and spare parts supply efficiency.
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.
View Details
0
Company Establishment
0+
Invention Patents
0+
Metro Clients Served
0%+
R&D Proportion of Revenue
Ready to find the right solution?
Our engineers will recommend the best-fit configuration for your specific application — at no cost.
Inquire Now
Related Products
Daily Maintenance of Electric Passenger Cars and Electromechanical Equipment
Specializing in rail transit passenger trains and their electromechanical equipment, we leverage our expertise in MTR asset management to provide routine maintenance services spanning the entire lifecycle of such equipment. By integrating computer vision, sensor technology, and AI-based diagnostic solutions, we conduct condition analysis and predictive maintenance, while optimizing the coordination of spare parts, personnel, and operational workflows. This approach helps clients reduce unplanned downtime, enhance train availability rates, and advance operational and maintenance standardization alongside resource optimization.
Laser limit detection device
A non-contact dynamic limit detection system, based on a 3D laser profilometer and machine vision, automatically performs external profile acquisition, limit exceedance assessment, and audio-visual alarms when vehicles pass through; this system provides real-time limit safety assurance for the entry and exit operations of rail transit vehicles during maintenance.
Inspection robot
The vehicle inspection robot system primarily consists of a robot, charging stations, track transfer equipment, a wireless network, a backend processing center, and a management platform. By leveraging the robot, computer vision technology, diverse control techniques, and advanced algorithms, the system automatically captures images of the undercarriage and side of the vehicle, and can utilize these algorithms to detect and identify vehicle anomalies.
Latest News
DITT Makes a Striking Appearance at MetroTrans 2025 China International Urban Rail Transit Exhibition and CAMET Forum
On September 18, the three-day "2025 China International Urban Rail Transit Exhibition" (MetroTrans 2025) officially opened at the CRCC Qingdao World Expo City.
1970-01-01 View Details
Qiantang District Delegation of Municipal People’s Congress Deputies Visits DITT for Research and Inspection
On August 29, Ruan Chonghui, Party Group Secretary and Director of the Standing Committee of the Qiantang District People’s Congress of Hangzhou, Zhejiang Province, led the Qiantang District delegation on a visit to DITT.
1970-01-01 View Details
Frequently Asked Questions
What does in-depth maintenance entail?
It encompasses comprehensive bogie overhauls, component-level specialized repairs, and multi-system coordinated commissioning, and possesses technical capabilities including bogie restoration and traction system reconfiguration.
How to control maintenance quality
Leveraging the ISO 22163 and ISO 55001 management systems, we achieve end-to-end digital traceability across testing, maintenance, validation, and traceability processes, thereby ensuring quality control of critical operational steps.
What professional backgrounds does the team possess?
What professional backgrounds does the team possess?
Which intelligent maintenance equipment will be used?
Equipped with intelligent laser rust removal systems, intelligent cleaning systems, and other equipment to assist in repair operations.
How to organize expert support
Leverage regional experts, mobile workstations, and an all-weather expert support network for collaborative support.
How to Optimize Costs and Spare Parts Supply
We adopt a pricing model consisting of a fixed rate plus optional value-added components, integrate spare parts life prediction to optimize replacement strategies, and leverage a digital procurement platform and a supplier database to provide genuine OEM spare parts resources.
Product Inquiry
Whether you'd like a quotation or simply want to learn more about us, we're happy to hear from you.
210
Phone
+86 15755389614 +86 13867213100
WhatsApp
+86 15755389614 +86 13867213100
Email
xucy@zstcloud.com cherieliu115@gmail.com
LinkedIn
cherieliu115@gmail.com
Facebook
Chaoyue xu Cherie Liu