Yuhan grew up in a poor family, but he was studious and strong-willed. By chance, he discovered the ancient relic "Notes on the Classic of Mountains and Seas" in a cave in the back mountain. This book not only covers ancient and modern historical data on astronomy and geography, but also contains unparalleled magical skills. After painstaking study, he finally achieved success. After experiencing a lot of ups and downs in the world, he became indifferent to worldly affairs and lived in seclusion in the mountains and forests.
