There didn't seem to be a clear distinction between day and night in this space. When Beiting Huang and the others entered, it was daytime, and the sky was gray. About a day had passed, but the sky had only darkened a little. A grayish-white crescent moon appeared in the sky, indicating that it was night.
When the crescent moon fell in the west, it would signal the arrival of a new day.
Although King Kong had said that he would fly over with Beiting Huang and the others, he rejected King Kong's good intentions after finding out that Three Pillar Peak was actually the only way for Beiting Huang and the others to leave this space. Since they had come in, it was impossible for them to leave safely just to keep the Jade Spirit Token.