First, they can enjoy the beautiful scenery. Some netizens put pictures they shoot along the way on the Internet, and many tourists are attracted by the enchanting scenery.
Second, the premier service on the train is also a contributor. To avoid high altitude sickness, the train provides oxygen supply and other services that make passengers more comfortable.
Third, safety and comfort are guaranteed. In order to ensure that passengers can arrive the destination safely and comfortably, the railway department carries out maintenance inspections on the equipment regularly.