? ? ? Passengers of train No. G5711 arrive at West Kowloon Station in Hong Kong, south China, Sept. 23, 2018. The high-speed train G5711 from Shenzhen in Guangdong Province arrived at the Hong Kong station on Sunday morning. The whole line of the Guangzhou-Shenzhen-Hong Kong Express Rail Link has been put into official operation, as the Hong Kong section of the high-speed railway went into service on Sunday morning. (Xinhua/Wu Tao)