A high-speed train runs on the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) after departing from Shenzhen North Railway Station in Shenzhen city, South China's Guangdong province, May 11, 2018. The Guangzhou-Shenzhen-Hong Kong Express Rail Link, with a total length of 140 kilometers, started its trial run on Monday. It took the train an hour and 18 minutes to reach the West Kowloon terminus from Guangzhou South Station, with stops in Futian, Shenzhen North and Humen. [Photo/IC]

A high-speed train runs on the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) after departing from Shenzhen North Railway Station in Shenzhen city, South China's Guangdong province, May 11, 2018. [Photo/IC]

A high-speed train runs on the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) after departing from Shenzhen North Railway Station in Shenzhen city, South China's Guangdong province, May 11, 2018. [Photo/IC]

A high-speed train runs on the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) after departing from Shenzhen North Railway Station in Shenzhen city, South China's Guangdong province, May 11, 2018. [Photo/IC]

A high-speed train runs on the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL) after departing from Shenzhen North Railway Station in Shenzhen city, South China's Guangdong province, May 11, 2018. [Photo/IC]