From the man's outfit, he must be a member of the Evil Practice if he was really a cultivator.
Anyway, it was only Gu Ning's guess, because she didn't see the man with her own eyes and couldn't make a judgment from his breath, but she thought that it was close to the mark.
After the man in black was gone, the boss of Ancient Charm said something to one of his staff members, then the staff member walked to the backyard right away and he came back with a man.
The man was precisely the person who made a deal with the old man and told the old man to sell the evil blue and white porcelain to Xiangyun Antique-store.