C712 Mysterious Woman
Zhang Yang didn't know what happened because the walls full of runes were connected to the place where Ying Xuan went into seclusion, making it impossible for him to enter.
However, from their conversation just now, he could vaguely guess that Ying Xuan probably already knew what was going to happen.
Moreover, it seemed like she had taken the initiative to leave, and hadn't been coerced