The Guangzhou–Kowloon through train (simplified Chinese: 广九直通车 or 港穗直通车; traditional Chinese: 廣九直通車 or 港穗直通車; pinyin: Guǎngjiǔ Zhítōngchē or Găngsuì Zhítōngchē) is an inter-city railway service between Hong Kong and Guangzhou jointly operated by the MTR Corporation of Hong Kong and the Guangzhou Railway Group of mainland China. Services operate along the East Rail line within Hong Kong territory, crossing the Hong Kong–Chinese border at Lo Wu, and continuing along the Guangmao Railway and Guangshen Railway in Guangdong province.