16 Where is the scroll of Yin-Yang Feng Shui Mystery?

No one knows where the second half of the 16-character yin-yang geomantic mystery is. The second half of the volume was destroyed by Mr. Zhang and disappeared. The sixteen-character Yin-Yang geomantic occult technique is the material in the novel Ghost Blowing the Lamp. According to the novel, this mysterious technology is omnipotent. It is written in the book that extremes meet, so Mr. Zhang destroyed half of the volume, leaving only half.