Regardless of whether The Drifters had cleaned up the ruins, Tang Zhen had to get rid of it because its existence was a huge hidden danger to Tang Zhen.
How could he allow others to sleep beside his bed? Tang Zhen wanted to completely control this Valley. This was a necessary step.
The only problem that he needed to consider was how to deal with the powerful monsters that might exist. If it was in the past, Tang Zhen would definitely be at his wits 'end. However, after experiencing the mysteriousness of the spirit brain corpse King and the horror of the corpse monster Lord, Tang Zhen was no longer afraid of high-level monsters. He even faintly had the idea of comparing the levels.
This was because he had a strong backing and firm confidence. These seemingly powerful enemies would eventually become the stepping stones in the process of building his city. They would allow him to stand higher and see further!