![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Ladies and gentlemen, attention, please. Our train is going into high altitude areas. Some passengers might feel light uncomfortable. Some passenger 1 experience headaches, chest tightness, breathing difficulty, dizziness and ear ringing. Don't be 2 and stay relax, please. You'd better keep seated for the moment. And walk slowly if needed. Do not smoke. Do not 3 , and don't eat too much. You would get used to the high plateaus. Thank you!