Li Xiandao confirmed that Tai Xuan was Emperor Gouchen so he gave up on trying to recruit him.
Tai Xuan had his own thoughts and he had his own goals. He wasn't willing to go under Li Xiandao.
At least the current Li Xiandao was unable to make him yield.
So after the two of them drank tea together, Li Xiandao got up and left.
Before leaving, the two of them didn't mention the Celestial Gate at all. Some things just had to be said once and there was no point in reemphasizing it.
...
Within the Bank of the Universe, Li Xiandao went into secluded meditation right after returning.
He went into the Time Hall.
Within it, there were three more demon god pillars. Li Xiandao wanted to use them to increase the strength of his worlds.
But the Book of War said that he had to use them to lay out the formation. Li Xiandao thought about it and gave it one while leaving two for himself.