让GPT模型新建一本有趣的小说，包含充满悬念的情节和有趣的人物描写。
两个长时间疏远的朋友无意间重逢。他们决定一起去云南省的丽江旅游，但旅行途中发生了一些奇怪的事情。
Sophie and Mark, two long-time friends who lost contact, unexpectedly reunite. They decide to travel together to Lijiang in Yunnan Province, but strange events occur during the trip, including hidden clues and suspicious behavior from their fellow travelers. As they uncover the secrets of their journey, they begin to question whether their reunion was a mere coincidence or if they were brought together for a greater purpose. As tensions rise, they must navigate through treacherous terrain and confront their dark pasts to reveal the truth behind their mysterious journey.