A launch ceremony of the Hong Kong section of Guangzhou-Shenzhen-Hong Kong high-speed railway is held at Hong Kong West Kowloon station on Saturday, September 22, 2018. The rail line will officially start operation on Sunday. (Photos: China Daily)

A launch ceremony of the Hong Kong section of Guangzhou-Shenzhen-Hong Kong high-speed railway is held at Hong Kong West Kowloon station on Saturday, September 22, 2018. The rail line will officially start operation on Sunday.

A train that will run on the Guangzhou-Shenzhen-Hong Kong high-speed railway is seen in this photo released on Friday, September 21, 2018. The rail line will start operation on Sunday.

A train that will run on the Guangzhou-Shenzhen-Hong Kong high-speed railway is seen in this photo released on Friday, September 21, 2018. The rail line will start operation on Sunday.

The inner view of a train that will run on the Guangzhou-Shenzhen-Hong Kong high-speed railway is seen in this photo released on Friday, September 21, 2018. The rail line will start operation on Sunday.

The inner view of a train that will run on the Guangzhou-Shenzhen-Hong Kong high-speed railway is seen in this photo released on Friday, September 21, 2018. The rail line will start operation on Sunday.