Thousands of Meters High in the Sky, the Echo of the Heartbeat

This is a modern romance novel that tells the story of flight attendant Lin Xia and pilot Gu Chen who met at an altitude of 10,000 meters. The two went from being dissatisfied with each other to gradually developing feelings for each other. As their understanding deepens, they discover that each other has an unknown past. How will these pasts affect their future?