The terms green-skinned train and green train () refer to a type of design which used to be the mainstay of the passenger railway fleets of China and other communist countries during the Cold War. These words carry connotations of slow travel on old vehicles with few amenities, most notably lacking air conditioning. Despite these connotations, most locomotive-hauled passenger railroad cars in China have been repainted to a shade of dark green.
Although strictly speaking only a subset of Chinese carriages have green as their original paint color, such as the Type 23 and , colloquially the term "green-skinned train" usually refers to the service classes of "æ®éÂÂæ 客快车" (conventional fast train) and "æ®éÂÂæ 客åÂÂ车" (conventional slow train) which use locomotive-hauled trains without a fixed consist of railroad cars. Starting from 2014 almost all conventional rail cars have been gradually repainted to a "olive green" colour, supposedly to reduce operating expenses and make military use of railways harder to spot. Only a few cars still retain their original color, in particular Type 25G cars maintained by Xidaku (西大åºÂ) depot in Beijing. This green-painting ("å·绿") has angered many Chinese railfans, and original-colored cars ("Ã¥ÂÂè²") are considered very valuable to photograph and film.