DITT (Hangzhou) Technology Co., Ltd. is a national-level "Little Giant" enterprise (specialized, refined, distinctive, and innovative) dedicated to technological innovation and real-world application in rail transit visual intelligence. Since its founding in 2018, the company has built a solution matrix covering both onboard and trackside inspection, powered by self-developed AI visual perception algorithms, intelligent hardware clusters, and intelligent O&M systems, serving 20+ rail transit systems across China and helping raise average O&M efficiency industry-wide. By continuously deepening "technology-driven + rail transit" applications and working with its subsidiaries — Zhonggang Maintenance, ZS Laser, and Yunshang Urban Rail — the company has built an open, shared industrial ecosystem that reduces costs and improves efficiency across the entire chain, driving the transformation of rail transit O&M toward flexible supply chains, predictive maintenance, and full life-cycle management.

          Its subsidiary Hangzhou Zhonggang Metro Equipment Maintenance Co., Ltd. specializes in full life-cycle maintenance of rail transit vehicles and electromechanical equipment. With a comprehensive maintenance track record and a consistently reliable quality and safety system, it delivers intensive, efficient, professional, and customized maintenance services for rail transit.

          Its subsidiary Zhejiang Zhongshu Laser Equipment Co., Ltd. focuses on the in-depth application of laser cleaning technology in rail transit equipment maintenance. It independently develops intelligent, serialized laser cleaning equipment and offers customized, integrated cleaning solutions, leading new trends of professional, efficient, and eco-friendly cleaning in rail transit.

         Its subsidiary Yunshang Urban Rail (Zhejiang) Supply Chain Co., Ltd. specializes in rail transit supply chain digitalization and zero-inventory integrated solutions, building a "dual-platform-driven" ecosystem: e-Train Network, a leading industry e-commerce trading platform, and Yunshang Urban Rail, a one-stop materials supply platform. With 20,000 supply chain enterprises on board and serving 50+ urban rail operators, it helps the industry cut costs, improve efficiency, and achieve high-quality development.