C174 Tzu xuan and wan fa

In fact, when I talked about Wan En Temple with Martial Aunt Ci Xuan, I started to suspect, why didn't Ci Xuan react at all? Logically speaking, if someone was approaching me with ill intentions, even the most magnanimous person would have a change in expression, but Ci Xuan wasn't. At that time, I was thinking, maybe Ci Xuan already knew about this