*Intersection of time and space**: The Seventh Hospital is actually the intersection of time and space rifts. Modern medical equipment coexists with the remains of Buddhist temples from the Tang Dynasty. The ward doors may lead to different eras.
- **Causal contamination**: The patient's exposure to abnormal phenomena will produce "karma values". When the critical point is exceeded, mutations will occur, and translucent ancient souls are wandering in the corridors.
- **Brahma System**: Smart electronic wooden fish are hung in each ward, and the number of taps is directly linked to the patient's mental stability, forming a digital practice system.
