There are four railway stations in Beijing. If you take the train to travel pls check which station you need go.
1.Beijing Main Station (metro Bejingzhan) for Trans-Siberian trains to Moscow & Ulan Bator, trains to Harbin, a few sleeper trains to Shanghai.
2.Beijing South, also known as Beijing Nan, for high-speed trains to Shanghai & Tianjin.
3.Beijing West, also known as Beijing Xi, metro Junshibowuguan, for trains to Xian, Hong Kong, Guangzhou, Nanning, Guilin, Tibet...
4.Beijing North for trains to the Great Wall.