Kai and his disciples left the area after he had given Mei Lee the Lee family deeds back. The sun was just starting to rise when they arrived home. Kai gave his disciples a few pointers and answered their questions on their cultivation then let them off to their rooms.
Kai had felt that Mina was close to breaking through to the 2nd Stage of Qi-Condensation. But thanks to the artificial seal set by [Sub-Core Manual], Mina had been unable to breakthrough. Kai told her to focus on today's battle as inspiration which helped Mina breakthrough, however in reality, Kai had simply lifted the cap on her cultivation. He now allowed all of his disciples to reach the 4th Stage of Qi-condensation.
Kai himself was still only on the 6th Stage of Qi-Condensation, so he wanted to keep them at least two stages beneath him at all times.