The matter of yin and yang has existed from ancient times to the present, from the palace to the countryside. Regardless of whether it is a custom or not, we will not discuss it for the time being. However, as famous books in traditional culture such as "Bagua" and "Book of Changes", they are all cultural books known to all sects and have always occupied a large amount of people's memories in the long history. This book is just a novel, regardless of whether it is feudal superstition or not, and it does not involve real life. All contents are fabricated and fictitious. Any similarity is purely coincidental.
