"I have learned from your memory that you formed the Yin-Yang Sacred Pellets with all five of your wives in the Sacred Breeding Garden, is that correct?" Xu Ye asked.
"That is correct. We all have Yin-Yang Sacred Pellets in our dantian," Lin Fei replied.
"Having these pellets means there is Yin-Yang fusion energy within your dantians. Furthermore, the Yin-Yang fusion energy you share with those five wives is all of the same origin. As far as I know, Yin-Yang fusion energy of the same origin will produce Yin-Yang frequency resonance when the Energy Induction Technique is applied. This resonance can be perceived, and the range of perception is vast; it can ignore any restrictive barriers. As long as you circulate your Yin-Yang fusion energy to perform the Energy Induction Technique while inside this forest of towers, it will not be difficult for you to sense the whereabouts of those four wives."
Chapter 3400