"We may have been on opposite sides of this conflict, Major, but I don't think we're as different as some might think. We have a lot of common ground."
He gives you a contemplative look, but his expression reveals little.
You look down at your tablet and consider the notes you were given. Interrogations are never direct question-answer affairs, especially with a prisoner as intelligent as Zhang. The info on him reveals that he actually grew up in Free Lhasa, and no doubt he has valuable local information. You know that there are general areas which Astral Intelligence would like more info about, but you have a lot of latitude on how you get there.
"Tell me about Free Lhasa," you begin. "I understand you spent your early years there."
It's hopefully a fairly neutral subject with few real secrets, and Zhang is forthcoming with some basic information. No matter what he may think of Terra, the Astral Corps, or even you, he knows that making at least a show of talking will help his chances of avoiding trouble. He answers your questions politely, but reveals nothing new. It's just part of your process to establish a rapport, textbook interrogation stuff. You know he'll never willingly give you sensitive information, but Astral Intelligence already has most of the puzzle; you just need to get another piece. It's a technique that will probably only work once, though, and you need to choose carefully which piece you try for.