Zhao Huaiji had always been staying near Qitian Pavilion, not specifically waiting for Tan Shuchang. This was part of a plan they had agreed upon before descending the mountain.
However, who was to set up the secret realm had not been decided.
After all, unforeseen factors were inevitable, and since Zhao Huaiji happened to be available to leave, it was decided that he would be responsible for this task.
As for why this was necessary, it was related to the concept of "destined prophecy."
What is destined prophecy?
Put simply, if enough people speak of it and believe in it, including the implicit will of heaven, then it becomes destined prophecy.
And this—was the process of refining a false destined prophecy into a true one!
Long Zhangyuan was that false destined prophecy.
However, such a false destined prophecy could not be assumed by just anyone. Otherwise, Tutian Mountain would not have waited a hundred years for Long Zhangyuan before initiating their righteous plan.