The difference between evil spirits and north-south transparency is that the air that passes directly through the house without any obstruction is "evil air", while only the air that passes through the house slowly and curvedly is north-south transparency.
Therefore, a house with transparency from the north to the south can only create an unstable aura, but cannot form a swirling auspicious energy. It does not hide wind and gather energy, and there is no good Feng Shui. Evil spirits in the hall have a negative impact on the wealth and health of the homeowner and his family.