The next day, the supervisor tells Bai that he has found the cause of the nose problem, but that he will not be able to deal with it until the end of the investigation. Bai tells the supervisor that he cannot leave the investigation until he finds out the cause, and he promises to do so within a week. The supervisor assures Bai that she will find the cause within the next week. Bai thanks the supervisor for his kindness, and tells him that since the press conference, the tables in the conference room have been thoroughly cleaned. He wonders if he can find something there, and the supervisor assures him that there are many experienced colleagues in the sales department who can handle the situation