"What you knew, you couldn't talk about. And what you didn't know, you couldn't ask about," says Chiang Chih-tai. He says you'd often see a fellow Guardian with whom you shared a room get up in the middle of the night and pack his bags. You knew something important was up, but you wouldn't ask where he was going.
「知道的不能講，不知道的不能問」，蔣志太說，常常同個寢室的袍澤，眼看著戰友半夜起來收行李，知道有重要任務，卻也不會問他要上哪兒。