This day's weather is very clear, cloudless, blue sky hanging a huge sun, a famous plane slowly flew under it.

"dear passengers, the plane will arrive at Xining Airport in half an hour. Please get ready to disembark!" The sweet voice of the stewardess came from the loudspeaker.

in the cockpit, there is a middle-aged male captain in the main driver's seat and a crew member in the copilot's seat. They chat with each other with interest and adjust the instrument from time to time.

"I have half an hour to go to Xining, but I need to have a good rest there today!" The captain said with a smile....