This photo taken on Feb. 28, 2026 shows a smart testing robot capable of precise fault identification and early warning on abnormality operating at a passenger train inspection and service point of the Shanghai Locomotive & Rolling Stock Section of the China Railway Shanghai Group Co., Ltd., in Shanghai, east China. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)

A mechanic tries to locate gas leakage in the air ducts of the brake cylinders of electric multiple units (EMUs) with a smart multi-functional acoustic imaging device at an EMU depot of the Shanghai EMU Section of China Railway Shanghai Group Co., Ltd., in Shanghai, east China, Feb. 28, 2026. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)

A mechanic checks wheels of an electric multiple unit (EMU) with an smart ultrasonic flaw detector at an EMU depot of Shanghai EMU Section in Shanghai, east China, Feb. 28, 2026. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)

Train drivers check the shunting error prevention system at a maintenance field of the Shanghai Locomotive & Rolling Stock Section of the China Railway Shanghai Group Co., Ltd., in Shanghai, east China, Feb. 28, 2026. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)

Workers analyze rail damage data with the smart rail damage identification and analysis system at a workshop of Shanghai Works Section of China Railway Shanghai Group Co., Ltd., in Shanghai, east China, Feb. 28, 2026. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)

A worker collects data from a data cabinet with a hand-held device aboard a train at the Shanghai Signal & Communication Section of China Railway Shanghai Group Co., Ltd., in Shanghai, east China, Feb. 28, 2026. The China Railway Shanghai Group Co., Ltd. has deployed a variety of cutting-edge high-tech gears during this year's Spring Festival travel rush to further empower its staff members in rail inspection, vehicle maintenance and other missions to safeguard passengers on their way. (Xinhua/Wang Xiang)