I took a peek at the book ending for this Drama and there is a scene I wish they kept in.
In the novel, after Bai Jue's sacrifices, she manages to find traces of Bai Jue's thoughts on her bracelet. What she finds is, 'I am Bai Jue'. Seeing that, Shang Gu absolutely loses it and starts to cry. She wonders if those were the words he wanted to tell her the most, that he was Bai Jue, not Qing Mu, Bo Xuan or anyone else.
It gives a whole lot of significance to the first words he says to her at the end.