Stewardesses provide service for passengers during a trial trip for journalists from Beijing, capital of China, Dec. 22, 2012. China will open the world's longest high-speed railway on Dec. 26, shortening the travel time between Beijing and Guangzhou to about 8 hours with an average speed of 300 km per hour. Designed with a maximum speed of 350 km per hour, the high-speed line has 35 stops, including Shijiazhuang, capital of north China's Hebei Province, Zhengzhou, capital of central China's Henan Province, Wuhan, capital of central China's Hubei Province and Changsha, capital of central China's Hunan Province.