Train 003 / 004 Beijing - Moscow - Beijing. One of the most popular Trans-Siberian /
Trans-Mongolian trains for both Russians and foreigners. This is a privately
run passes through Ulaanbaatar on its way to Beijing. The train is operated by
Russian and Chinese staff. When the train passes from Mongolia into China, the
wheels of the train are changed to a smaller gauge - the whole process takes
few hours. The train has both 1st with shower and 2nd compartments. It has a
nice car-restaurant.