He spoke animatedly and seemed about to take off his seat belt and stand up. Luo Ji was seized by dread and despair and felt as if he had fallen into an ice pit. Noticing his discomfort, Shi Qiang stopped. “Well, then, let’s not talk about interrogation, even if it might be useful to you. You can’t take it in all at once. Besides, I was going to tell you how to trick people, so just remember this: Real shrewdness means not letting any shrewdness show. It’s not like in the movies. The truly astute don’t sit in the shadows all day striking a pose. They don’t show off that they’re using their brains. They look all carefree and innocent. Some of them are tacky and mawkish, others careless and unserious. What’s critical is not to let others think you’re a person of interest. Let them look down on you or dismiss you and they won’t feel you’re an obstacle. You’re just a broom in the corner. The pinnacle of this is to make them not notice you at all, as if you don’t exist until the moment right before they die at your hands.”

“Will I ever have the need or opportunity to become that sort of person?” Luo Ji broke in to ask.

“Like I said, I know no more about this than you do. But I’ve got a premonition that you need to become such a person. Luo, my man, you’ve got to!” Shi Qiang grew excited again and clapped him on the shoulder with enough force to make him wince.

Then they sat in silence watching the clouds of smoke curl upward to the ceiling, where they were sucked away into a crack.

“Screw it. Let’s hit the sack,” Shi Qiang said as he ground out his cigarette in the ashtray. He shook his head with a smile. “I’ve been going on like an idiot. When you think back on this, don’t laugh at me.”

In the bedroom, Luo Ji took off his bulletproof jacket and wrapped himself in the safety sleeping bag. Shi Qiang helped him tighten the straps holding it to the bed, and then set down a small vial on the bedside cabinet.

“Sleeping pills. Take them if you can’t sleep. I asked for alcohol, but they said there isn’t any.”

Shi Qiang reminded Luo Ji that he should notify the captain before getting out of bed, then turned to leave.

“Officer Shi,” Luo Ji called after him.

At the door, Shi Qiang half-turned back to look at him. “I’m not any sort of cop. The police aren’t involved in this thing. Everyone calls me Da Shi.”

“Well then, Da Shi, when we were talking just now, I noticed the first thing you said. Or, I guess, the first thing you said in reply to me. I said, ‘the woman,’ and you didn’t realize for a moment who I was talking about. That means that she’s not a major part of this case.”