A passenger takes a selfie with G5711, the first high-speed train from Shenzhen to Hong Kong, at Shenzhen North Railway Station in Shenzhen City, south China's Guangdong Province, Sept. 23, 2018. G5711 train left Shenzhen North Railway Station at 6:44 Beijing Time on Sunday (1044 GMT Saturday) for West Kowloon Station in Hong Kong, marking the opening of the Hong Kong section of the Guangzhou-Shenzhen-Hong Kong High-speed Railway and that of the whole Guangzhou-Shenzhen-Hong Kong High-speed Railway. (Xinhua/Mao Siqian)

HONG KONG, Sept. 23 (Xinhua) -- The whole line of the Guangzhou-Shenzhen-Hong Kong Express Rail Link is fully open to traffic, as high-speed train G5736 left Hong Kong West Kowloon Station at 7 a.m. Sunday to head for Shenzhen North Railway Station in Guangdong Province on the mainland.

On the mainland, at 6:44 a.m., high-speed train G5711 left Shenzhen North Railway Station to head for Hong Kong West Kowloon Station.