There is such a kind of bird in the world, they migrate in spring and autumn every year and fly over the soaring Himalayas. When the flavour of spring pervades in the air again, the spring migration is about to begin, and the bar-headed geese will return to the starting point of life: the Qinghai-Tibet Plateau. The female bar-headed goose in the flock, named Bai Spohr, came to the departure point again with clockwork precision. She seemed to have a strong desire to return to the Qinghai-Tibet Plateau. What is the secret?The work is full of passion, shock, sigh and excitement, combining literariness, scientificity and readability in a one.