Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL): Positioning China in HSR May 1, 2012 | Features China, which already boasts the world’s longest HSR network of over 8,000 km, is investing heavily in extending the service to many Chinese cities. The Guangzhou-Shenzhen-Hong Kong Express Rail Link (... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password