When Bai Pu and the others stepped onto the magic teleportation array to return, Dai Sect did not return to the academy but left.
The reason given to the natives was that the protection task had been completed, and next, he planned to travel around the continent.
He did share the truth with Bai Pu.
"My main quest has been completed, and the remaining stay time is also limited. It's hard to trigger the next stage of the main quest in the academy... I plan to stay in the Red Sand Tribe to see if there are any side quests here."
At Dai Sect's current level of strength, the Advanced Spirit Realm gives little to no help for his growth. Only the top native powers, or those beyond the norm, usually existing only in the "background," can offer him guidance and improvement.
Maybe Principal Bosh counts as one. This time Dai Sect managed to increase Bosh's favorability by doing quests and gaining some reputation.
