It mentioned that he was nearby but covered by a medicinal smell, we can infer that this prevented it from smelling him/recognizing his sent.
She abandoned everything and flew towards it instantly. Despite being tens of miles away, she had heard the sound as clear as a loud whisper in the ear. It was familiar and melodious to the ears. Before long, she saw Wei Wuyin seated. She cried with joy!
Nana enjoyed the embrace for a moment, asking herself if it hadn't been a mistake choosing to not have children. After her fall from grace, she had withdrawn, avoiding any meaningful relationship to not get hurt again.