I’ve watched so many Kdrama and Cdrama and well aware of actors getting cast in dramas due to their popularity in music industry, I’ve seen it in a lot in Korean dramas.
Cheng Xiao is absolutely lacking in looks, charisma and of course acting. For one reason Her face that resembles an animated character due to extensive cosmetic surgery, that she actually look mean and unsympathetic.
Absolutely no chemistry between the two leads because of her being miscast.
She is better off playing Antagonist characters.