MTR KTT

KTT (simplified Chinese: 九广通; traditional Chinese: 九廣通) was a push-pull train set used by the MTR Corporation Limited in Hong Kong on the Guangdong Through Train route. It was used on the Guangdong line (Hung Hom (Kowloon), Hong Kong - Changping - Guangzhou East) of the through train service.

The double-deck "KTT" trailers have bottom floors which are lower than ordinary cars serving on the same pair of tracks.

After the Guangdong Through Train and all other intercity passenger services were suspended in early 2020 amidst the coronavirus pandemic, the KTT trains were placed into storage. On 31 July 2024, the General Administration of Customs announced that in June 2024, the State Council had approved the closure of all four railway ports of the inter-city through trains, effective from the date of notice, citing that high-speed passenger trains have effectively met the travel needs of passengers between the mainland and Hong Kong.

Since 17 January 2025, one of the Re460 locomotives and 2 of the compartments are displayed at the "Station Rail Voyage" exhibition at Hung Hom Station.