I am still waiting for Sui to nobly sacrifice herself or do something (anything) for other people, like everyone else has for her. I wouldn't mind her egocentrism it if she wasn't supposed to be madly in love with Liang, but she is and she still is absolutely self-absorbed.

And the vanishing mum subplot is just odd. Where is she? Does evil dad keep her in a box and only bring her out if he wants to totally crush Sui?