The waiter tells the shop owner that he has seen a man in his clothes. The shop owner asks the waiter if he's seen the man before, and the waiter says that he'd seen him once before. The shopkeeper tells the waiter to go inside and look for the man. The man is wearing a seaweed mask, so the shopkeeper orders the man to enter the room. He's wearing a bam mask, which means that the man is from the bam district of Shanghai, which is where the waiter used to live. So the shopkeeper searches the room, looking for the waiter. He finds the waiter, who's dressed in his bam clothes, and asks the shopkeeper to let him in. The waiter agrees to let the man in, but warns the shopkeeper not to look too closely at the man's face, because it's too dark.