In the days preceding Song Junwan's arrival outside his immortal's cave, Bai Xiaochun had pondered what to do regarding her request. He knew that after she emerged from seclusion, she would come looking for him, to ask for his help during the trial by fire for the position of blood master. For many days, she hadn't come.
Just when he was trying to decide whether or not to take the initiative to go see her, he heard her voice. At that point, his eyes glittered, and he cleared his throat. Instead of immediately opening the door of the immortal's cave, he decided to take advantage of the situation to make her wait outside, thus increasing his own perceived value.