A glimpse of opportunity: Start by marrying a mermaid bride.

Fate, luck, feng shui, accumulating good deeds, and studying are all important factors in life. In this world, fate determines everything. Some are born literate and eloquent, yet their fates are unkind, wasting half their lives. Others are born strong and martial arts prodigies, but lacking opportunity, they are confined to the countryside as villagers. Therefore, opportunity is crucial in life. Zheng Xuan transmigrates to the end of a dynasty, a time of chaos and demonic martial arts. He carries an opportunity system that allows him to see hidden opportunities. While other powerful figures fight tooth and nail for even the smallest chance, Zheng Xuan, with the help of his system, quietly seizes top-tier opportunities unknown to anyone. From then on, his path is smooth, rising from a poor country boy to an unparalleled immortal. Of course, all of this begins with a mermaid! [This is based on the well-established fantasy novel "Wife, You Didn't Really Drug Me, Did You?", which has already achieved a high quality of 500 million words.]