After Li Dalong selected the sites for the fifteen Yin-Yang Heaven and Earth Formations, Ye Xingchen moved every sect member out of the Secret Realm, both to prevent them from interfering with Li Dalong's work and to prevent the secret from leaking, lest anyone realize that the special effects inside were caused by formations.
Once Li Dalong confirmed that everyone from the Limitless Immortal Sect had withdrawn, he began the grueling life of setting up formations.
It took Li Dalong a full six months to finish setting up the fifteen great formations. He had to refine many of the materials himself, perform various calculations based on the terrain, and camouflage them to prevent anyone from recognizing the origins of the Yin-Yang Heaven and Earth Formations.
However, those six months of working without sleep or rest brought his understanding and comprehension of the Yin-Yang Heaven and Earth Formation to a new level.
In particular, when working on the final two thousand-person formations, he incorporated his own insights to improve and experiment with the Yin-Yang Heaven and Earth Formation. He succeeded, increasing their time acceleration effect to elevenfold.
But the difficulty of setting up these formations and the materials they consumed also increased greatly.
Moreover, Li Dalong felt that these two improved formations were still imperfect and could only be used experimentally for the time being.
Converting them all into this improved version of the Yin-Yang Heaven and Earth Formation still did not seem worthwhile in terms of the resources and time required.
Mainly, he did not want to keep living this life of setting up formations day and night.
After setting them up, he tested all fifteen Yin-Yang Heaven and Earth Formations. Every one of them ran smoothly.
He left the Secret Realm and reported to his father-in-law, Ye Xingchen, that