Chi Xue and the others needed to keep capturing powerful Ancient Divine Beasts. After all, capturing just one was nowhere near enough for them to refine its Origin Bloodline Power. That meant they couldn't retreat into seclusion to cultivate and refine the Ancient Divine Beast's Origin Bloodline Power. It would be better to let Po Di and the others refine the one they had already captured. Once Po Di and the others grew stronger, they could help capture more Ancient Divine Beasts, which would at least strengthen the alliance as a whole.
Next, Chi Xue and the others continued searching for powerful Ancient Divine Beasts, though that would take time. With the mist shrouding everything, they could no longer track the beasts' movements and had to rely on luck to find them.
Not long afterward, some cultivators sent by Po Di joined up with Po Tian and the others. After securing the Ancient Divine Beast, they returned to their base. Of course, if Chi Xue and the others captured another one, they would come back for it. One Ancient Divine Beast was nowhere near enough for all of Po Di's people to refine.
It was worth mentioning that the cultivators Po Di had sent passed through the central region of the God Realm, not far from where Ling Tian was. But because of the mist, Ling Tian never noticed them. He thus missed a prime opportunity to capture them and obtain the secret technique for refining an Ancient Divine Beast's bloodline power. Capturing these cultivators would have been far easier than capturing Chi Xue and the other God Devouring Bodies, and they all knew the secret technique for refining the bloodline power of powerful Ancient Divine Beasts.
Of course, Ling Tian knew nothing about this, so he had no reason