As He Xing was in the elevator, his mind echoed with the words Fu Han had said. If she hadn't come in, what would He Xing have done—ignored the situation as if he saw someone dying?
He clearly understood that before he saw the video sent by Fu Han, he would never have ignored Xia Ning's situation. After all, Du Wanting had saved his life, Xia Ning had also saved him, and He Xing was partly to blame for the injury on Xia Ning's face.
But was the only way to save Xia Ning really to pledge himself to her? He Xing didn't believe so, and he certainly wouldn't actually do that sort of thing with Xia Ning.
When he was hiding from Xia Ning in the ward, it wasn't for any other reason, but because he had already pressed the emergency call button; he was waiting for the doctor to come and handle the situation.