It's been over a year since I've watched this but what you remember about a drama really says a lot. For Pretty Li Hui Zhen, here's what I recall:

I found Li Hui Zhen to be too cringey and almost unbearable to watch. She perpetually looked confused and sounded nervous. (I really want to like Dilraba Dilmurat's dramas but I haven't liked any of her roles - Sweet Dreams, Eternal Love, The Flame's Daughter.) I did like that Li Hui Zhen's manager(?) Zhu Ying was really nice and that Li Hui Zhen pursued her dream. Peter Sheng's acting was so unexpressive I felt like I was watching a block of wood. I loved his phone calls with his friend.

Vin Zhang was a scene stealer and I love him, and thank goodness he's playing the main role in his upcoming dramas. Sierra Li did such a good of a job playing Xia Qiao that I can't watch her in anything else without thinking of how much I disliked her in this drama. I have such a hard time with that storyline because I really like themes of friendship in dramas, and this sort of lie is difficult for me to forgive.