Bao Zhang and Yang Mo were basically Xu Tui's visible combat strength. Therefore, he brought Bao Zhang and Yang Mo along when he headed to the target's Six Imperial Palace.
As for Kitawan, Lang Gui, Feng Ran, Belas, and Lally, Xu Tui used them as hidden combat strength and threw them into the quantum dimensional chain. Of course, they could be considered a hidden combat strength.
Xu Tui's current target was Emperor Ziwei's Ziwei Palace.
Why was it the Palace of the Emperor Ziwei?
The goal that Xu Tui had set previously was to kill or severely injure the power of the Spiritual Race and the Lord of Myths, Ullr, to stop them from continuing to refine the Six Imperial Seals.
Before this, Xu Tui had snatched the Mount Heng Divine Seal from Chi Qing of the Spiritual Race. In the clergy system of the Heavenly Court, the Mount Heng Divine Seal belonged to one of the six rulers, Emperor Ziwei.