Why does Feng Shui book say that places with many women have strong Yin energy?

Ancient Chinese philosophy believes that the two opposites in the universe that connect matter and human affairs are "yin and yang". Things in nature include big and small, long and short, up and down, left and right, etc. The ancients classified them as big, long, up, and left as yang, and small, short, down, and right as yin. Yang is strong and Yin is weak. Men are strong in nature and belong to the left side; women are gentle in nature and belong to the yin side in the right side.

In addition, it is also related to the tradition of male superiority and female inferiority in Chinese feudal society. From left to right, men come first and then women. Men are masculine and have a higher status than women.