Guangzhou Metro Group and CRRC Zhuzhou Locomotive Co Ltd jointly unveil their latest green intelligent urban rail vehicles in Guangzhou, capital of Guangdong province, on Monday. [Photo provided to chinadaily.com.cn]

They utilize various new energy-saving and environmentally friendly technologies, allowing them to achieve energy savings of over 15 percent compared to traditional vehicles with asynchronous traction systems.

The trains have OLED windows, hearing-impaired assistance, intelligent temperature and dehumidification control, smart lighting adjustment and USB/wireless charging.