Seclusion.

Shi Lang was inside the core area of the Tartarus training center. He had came and made the life of the disciple even worse than before. He installed spirit guns all over the facility, and they were even more troublesome to deal in addition to the various killing arrays. The disciples were getting used to the arrays, but not only did Shi Lang change these arrays and their placements every day, he also told the array formation experts inside the sect to practice here and making them harder. 

Hou Bing enjoyed the scenes on the upper levels. Whenever Shi Lang took a break from his cultivation to ponder and meditate, she would chat with him and help him in overcoming various obstacles. 

Shi Lang wanted to know how strong did he need to be in the world outside, when Hou Bing said, "You need to have a deeper understanding of your Dao Laws. What do you think Dao Laws are for?"