There are two realms in the world, Yin and Yang, which are intertwined but each follow unique laws. The Yang Realm is dominated by modern urban life. People live their daily lives and most of them know nothing or half-doubt about the matters of Yin and Yang. The underworld is where ghosts, evil spirits, ghosts and other spiritual entities reside, and is governed by a complex set of underworld laws. There are some special passages and nodes between the yin and yang worlds, which are usually isolated from each other, but occasionally they intersect due to some special events or forces, resulting in an imbalance of yin and yang and triggering various weird and supernatural phenomena.
But I'm sorry, everyone, this is my first time writing, and I didn't control the format well. It may seem a bit too much, but I have tried my best to change it on every page.