and how did land dust know the importance of Nandou mine.

it's very simple. Four words can be summed up: Magic search.

Lu Chen didn't plan to make the Huang family feel better at the beginning of the fight. Ransacking the Huang family was only the first step. During the killing process, Lu Chen searched the souls of all the monks of the Huang family all the time and learned more secrets of the Huang family. This is the message from the first day that Lu Chen killed a guard captain and searched for his soul.

the Huang family has three important places in the ground level star group, Fengyuan,...