Lhasa, the last stop of the study trip. Yu Tang put on the ancestral pocket watch left by his parents before they died with great expectation, hoping to get closer to his parents. In the center of the pocket watch, a star-shaped sapphire is inlaid on it. What is strange is that the entire gemstone has no trace of carving at all. At this moment, it is emitting a faint and mysterious light.
Concept: Future science fiction