Four Pillars Pure Yin, naturally weak and sickly.
Additionally, it could also be explained like this: He Qingfeng and Su Min had incurred the Five Disadvantages and Three Deficiencies; they revealed too many heavenly secrets, so retribution fell upon their child.
The latter seemed to better demonstrate their capabilities.
However, He Qingfeng and Su Min were very resistant to this notion.
Both of them didn't believe in ghosts and gods.
They themselves concocted many "Miracles", so they wouldn't be deceived by some illusions.
What ghostly hauntings?
It was mostly coincidences or Eye-Blocking Techniques.
They were momentarily surprised, simply because they hadn't found a way to solve it yet, not because it was truly "supernatural" and had escalated to demons and monsters.
Thus, when their daughter was born naturally weak, He Qingfeng might mutter "Four Pillars Pure Yin", but Su Min firmly believed, "If my daughter is unwell, we shall go to the hospital."
