This article is more than 3 years old China to build world's deepest high-speed rail station under Great Wall This article is more than 3 years old -- * Share via Email Tourists crowd the Great Wall at Badaling where a new high-speed train line will stop. [ ] Tourists crowd the Great Wall at Badaling where a new high-speed train line will stop. Photograph: Imaginechina / Rex Features China will build the world’s deepest and largest high-speed railway station at a popular section of the country’s Great Wall as part of its preparations for the 2022 Winter Olympics, state media has reported. -- with an underground construction area of 36,000sqm (387,501sqft), equal to five standard soccer fields, making it the deepest and largest high-speed railway station in the world,” Chen Bin, director in charge of construction for China Railway No 5 engineering group, told the People’s Daily newspaper. -- China has embarked on an ambitious programme of railway construction, which includes the world’s longest high-speed line between Beijing and Guangzhou.