Passengers of train G99 pose for a group photo at Hongqiao Railway Station in Shanghai, east China, Sept. 23, 2018. Train G99, the first high-speed train from Shanghai to Hong Kong, left Hongqiao Station on Sunday for Hong Kong West Kowloon Station. (Photos: Xinhua)

Passengers of train G99 pose for photos at Hongqiao Railway Station in Shanghai, east China, Sept. 23, 2018. Train G99, the first high-speed train from Shanghai to Hong Kong, left Hongqiao Station on Sunday for Hong Kong West Kowloon Station.

Li Xiaojia, conductor of train G99, arranges the luggage at Hongqiao Railway Station in Shanghai, east China, Sept. 23, 2018. Train G99, the first high-speed train from Shanghai to Hong Kong, left Hongqiao Station on Sunday for Hong Kong West Kowloon Station.

Passengers wait for departure on train G79 at Beijing West Railway Station in Beijing, capital of China, Sept. 23, 2018. Train G79, the first high-speed train from Beijing to Hong Kong, left Beijing West Railway Station on Sunday for Hong Kong West Kowloon Station.

Train G79 waits for departure at Beijing West Railway Station in Beijing, capital of China, Sept. 23, 2018. Train G79, the first high-speed train from Beijing to Hong Kong, left Beijing West Railway Station on Sunday for Hong Kong West Kowloon Station.

Passengers of G79 take a selfie at Beijing West Railway Station in Beijing, capital of China, Sept. 23, 2018. Train G79, the first high-speed train from Beijing to Hong Kong, left Beijing West Railway Station on Sunday for Hong Kong West Kowloon Station.

Passengers walk to board train G79 at Beijing West Railway Station in Beijing, capital of China, Sept. 23, 2018. Train G79, the first high-speed train from Beijing to Hong Kong, left Beijing West Railway Station on Sunday for Hong Kong West Kowloon Station.

A staff member sends souvenirs marking the opening of high-speed railway between Fuzhou and Hong Kong to passengers at Fuzhou Railway Station in Fuzhou, capital of southeast China's Fujian Province, Sept. 23, 2018. Train G3001, the first high-speed train from Fuzhou to Hong Kong, left Fuzhou at 8:25 Beijing Time (0025 GMT) on Sunday for Hong Kong West Kowloon Station.

Passengers present souvenirs marking the opening of high-speed railway between Fuzhou and Hong Kong at Fuzhou Railway Station in Fuzhou, capital of southeast China's Fujian Province, Sept. 23, 2018. Train G3001, the first high-speed train from Fuzhou to Hong Kong, left Fuzhou at 8:25 Beijing Time (0025 GMT) on Sunday for Hong Kong West Kowloon Station.