On August 9, inside the Chongqing North EMU Maintenance Depot of China Railway Chengdu Group Co., Ltd., ground mechanics, often referred to as “bullet train doctors,” worked tirelessly in temperatures exceeding 40 degrees Celsius. They inspected and maintained the CR200J EMU trains, focusing on service facilities, onboard information systems, car bodies, bogies, and braking systems. At this depot, over 150 ground mechanics endure extreme heat to ensure the safe operation of trains during the summer travel season. The photo shows a ground mechanic performing maintenance on a train.
A ground mechanic performs maintenance on a train.
A ground mechanic performs maintenance on a train.
Chongqing North EMU Maintenance Depot
The Chongqing North EMU (Electric Multiple Unit) Maintenance Depot is a key facility in China’s high-speed rail network, responsible for the maintenance and servicing of EMU trains operating in the southwestern region. Established to support the growing demand for high-speed rail travel, it ensures the safety and efficiency of trains serving major routes like the Chengdu-Chongqing line. The depot reflects China’s advancements in rail technology and infrastructure development.
China Railway Chengdu Group Co., Ltd.
China Railway Chengdu Group Co., Ltd. is a subsidiary of China State Railway Group, responsible for railway operations and management in Sichuan, Chongqing, and parts of Guizhou and Yunnan. Established to enhance regional rail infrastructure, it plays a key role in China’s western development strategy, operating high-speed and conventional rail networks, including the Chengdu-Chongqing railway, one of China’s earliest lines. The group supports economic growth and connectivity in Southwest China.
CR200J EMU trains
The **CR200J EMU (Electric Multiple Unit) trains** are a series of high-speed or higher-speed trains operated by China Railway, introduced in recent years as part of China’s expanding rail network. Designed for both efficiency and comfort, these trains operate at speeds of up to **160–250 km/h (99–155 mph)**, often serving intercity and regional routes. The **CR200J** is notable for its distinctive **green and yellow livery** and is part of China’s push to modernize rail travel, replacing older locomotives with more advanced, energy-efficient models. Some variants use **Fuxing (Rejuvenation) technology**, reflecting China’s domestic innovation in high-speed rail.
