The Beijing-Kowloon Through Train (Chinese: 京九直通车; pinyin: jīng jiǔ zhítōng chē) is an intercity railway service between Hung Hom Station (formerly Kowloon Station until 1998) in Hong Kong and the Beijing West Railway Station, jointly operated by the MTR of Hong Kong and China Railway, China's national rail service. The train runs to Beijing and Hong Kong every other day. Services use the East Rail Line in Hong Kong, cross the boundary between Hong Kong and mainland China at Lo Wu and then continue along China's railway network via the Guangshen railway and the Jingguang railway to Beijing. Total journey time is approximately 23 hours, and the train uses 25T class train carriages.
The train operates in two parts, where 11 carriages depart Hong Kong (travelling under number T97B from Beijing and T98B from Hong Kong) with an additional 8 carriages added at Guangzhou East Railway Station (using number Z97A/Z98A), totalling 19 carriages. Along the route, trains stop at Changsha, Wuhan and Zhengzhou, though only passengers travelling from Guangzhou may disembark due to customs and immigration reasons.
The Hong Kong to Beijing section of the train is divided into three distinct classes - hard sleeper, soft sleeper and luxury soft sleeper (catering only to two persons, with better furnishing and private lavatories). The Guangzhou to Beijing section of the train only have hard sleepers and hard seats.