This story, among Wesley's stories, has a characteristic: the suspense of the story is placed on top of an ancient Chinese legend-this form has been used repeatedly several times in subsequent Wesley stories. Chance, and will continue to be used, to Sinicize fantasy stories, which is a feature of Wesley's stories. This story still continues Wesley's unique style of dealing with aliens. Although the aliens came to the earth during the expedition, they are not impressive. On the contrary, they are unlucky and pitiful. It didn't go very well, it was to express a concept: people, or advanced creatures on a planet, always belong to this planet.People can migrate on a star body, but interstellar migration, that is probably the beginning of a great tragedy.