China Rail: Overnight Sleeper to Hong Kong

Join me on the new G899 route from Shanghai Hongqiao Station to Hong Kong on the overnight G899 sleeper service taking just over 11 hours to travel 1,500km.
Starting October 1, the high speed rail sleeper trains operating between Beijingxi Railway Station, Shanghai Hongqiao Railway Station, and Hong Kong West Kowloon Railway Station will undergo comprehensive upgrades. The newly developed Fuxing intelligent sleeper EMU trains will begin service on the Beijing-Hong Kong High Speed Railway and Shanghai-Hong Kong High Speed Railway. The D909/910 train between Beijingxi Railway Station and Hong Kong West Kowloon Railway Station will be upgraded to G897/898, and the D907/908 train from Shanghai Hongqiao Railway Station to Hong Kong West Kowloon Railway Station will be upgraded to G899/900. After the upgrade, travel time will be reduced, station stops will be optimized, Hong Kong's departure time will be delayed, and onboard facilities will be improved, further enhancing service quality. The overnight sleeper's convenience will also be more pronounced.
These upgrades will significantly enhance the quality of cross-boundary passenger transport between the mainland of China and Hong Kong, better meeting the needs of travellers for a more enjoyable travel experience. This improvement is expected to promote greater personal, economic and cultural exchanges between Hong Kong and the mainland, contributing to Hong Kong's deeper integration into the national development strategy.
The high-speed rail (HSR) network in the People's Republic of China (PRC) is the world's longest and most extensively used. The HSR network encompasses newly built rail lines with a design speed of 200-380 km/h (120-240 mph). China's HSR accounts for two-thirds of the world's total high-speed railway networks. Almost all HSR trains, track and service are owned and operated by the China Railway Corporation under the brand China Railway High-speed (CRH).
High-speed rail developed rapidly in China since the mid-2000s. CRH was introduced in April 2007 and the Beijing-Tianjin intercity rail, which opened in August 2008, was the first passenger dedicated HSR line. Currently, the HSR extends to all provincial-level administrative divisions and Hong Kong SAR with the exception of Macau SAR.
Notable HSR lines in China include the Beijing-Kunming high-speed railway which at 2,760 km (1,710 mi) is the world's longest HSR line in operation, and the Beijing-Shanghai high-speed railway with the world's fastest operating conventional train services. The Shanghai Maglev is the world's first high-speed commercial magnetic levitation (maglev) line that reaches a top speed of 431 km/h (268 mph).
The economics of high-speed rail in China has been a topic of much discussion. A 2019 study produced by TransFORM, a knowledge platform developed by the World Bank and China’s Ministry of Transport, estimated the annual rate of economic return of China's high-speed rail network in 2015 to be at 8%, which is well above the opportunity cost of capital in China for major long term infrastructure investments. The study also noted a range of benefits which included shortened travel times, improved safety and better facilitation of tourism, labor and mobility, as well as reducing highway congestion, accidents and greenhouse emissions as some automobile travellers switch from car use to rail. A 2020 study by Paulson Institute has estimated the net benefit of the high-speed rail system to be approximately $378 billion, with an annual return on investment of 6.5%,