Where did the formula Hu Bayi read when he entered the customs come from?

From the world's first wonderful book-Feng Shui remnant volume "Sixteen-character Yin and Yang Feng Shui Mystery".

This book was created by a captain who touched gold in Qing Dynasty, and it contains the technique of Yin and Yang of Feng Shui. Although the sixteen-character Yin-Yang Feng Shui Mystery is called sixteen characters, it should be sixteen volumes, and each volume is represented by one word in ancient Sunday divination, so it is called sixteen characters. Note: This book is written by a ghost blowing a lamp, and the real world does not exist. So don't think you can find treasure everywhere, but it's not.

Origin:

In the late Qing Dynasty, there was a famous captain who touched gold, named Zhang Sanlian and Zhang. It is said that a captain Mo Jin dug up the whole image of 16-character divination from an ancient tomb, and combined with Mo Jin's patented product "dragon-seeking tactics", he wrote a "Secret of 16-character Yin and Yang Feng Shui".

However, this book stole the secrets of heaven and earth, fearing that it would damage the power of immortality, so it destroyed half of Yin and Yang, and the remaining half was passed on to Sun, an apprentice of a captain who touched gold, and even the biological descendants of a captain who touched gold were not taught. (Excerpted from Ghost Blowing Lights 1)