Jack and mu Yuan were in disguise. They wore human skin masks and pretended to be Westerners. The Information Officer cut off contact with them because the underground auction would not allow any surveillance equipment.
You could disguise yourself. The dark net did not care about the identity of the customer as long as the customer could afford to pay. Thus, mu Yuan and Jack spent a million euros in two days to buy two girls. Of course, after the girl bought it and spent a million euros, she could enter their first threshold. Coincidentally, there was an auction, and Jack and mu Yuan were invited.
Reyman and rose, the two information workers, were in a hotel not far from the auction, monitoring everything outside.