The Trans-Mongolia route was completed in 1950, it is one part of the massive railway networks of Trans-Siberia trains. Among these destinations along the road, Mongolia plays an indispensable role to connect China in one end and Russian in another. The train journey is enjoyable and safe with an affordable price, it shows the beauty of four the seasons in the greatest extent, when the grassland is abundant and the ice is spectacle. The domestic train routes have stops to main cities which is convenient.