If you lived in the sky, might you get stuck to the clouds while walking, and then, when the clouds left the Sky Island and it rained, fall down from the Sky Island? Therefore, it is said that people fishing on the seashore sometimes find bodies of Sky Island people who had drowned and washed ashore. Almost every one of them is wealthy, laden with much advanced technology.
Moreover, if you lived in the sky, might the sun become very hot? When evening came, it would become too cold. Alternating between cold and hot, one might catch a cold.
However, medical technology in the sky is highly advanced. They likely wouldn't get sick. But their books seem very expensive; old scholars have written their engineering knowledge into books, selling them at very high prices… directly exchanging them for glasses and a box of antibiotics.
