So, how to put this nicely...?
Considering the fakt, that most of the characters are in their 30s or seniors, most of them acted like high school kids.
Starting with the most annoying character: the doctors wannabe wife and later wife.
Imagine a five year old child, that clings to her mommy like an infant, is spoiled beyond measure, never makes any mistake and always gets what she wants - even if mommy and daddy have to buy it for her - in this case a husband. She falls in love with him after 0,5 seconds and does anything in her power to get him - as she has no more brain cells than a duck and therefore no power at all, mommy gets him for her. Altough he never shows the least bit of interest towards her, does not even care for her, she only asks him around episode 40 of 52 if he loves her and is angry and annoyed and runs back to mommy, when he can not tell her, that he loves her, because he does not. She treats everyone around her like a servant and cries and calls mommy all the time, if other people don´t do, what she tells them to do - yeah, and mommy solves the problems for her. She never makes mistakes, it is always the other person, that it wrong and nobody cares about her feelings and thoughts (yeah well, as mentioned before, there are no thoughts because of the lack of braincells...). I don´t know, if there is any character growth starting from episode 43, because I had to fast forward any scene with her in it.
The eldest son: stuck up doctor who sells himself for a higher position in the hospital. This guy - I don´t even know, how someone can be so disrespectful to his father, who raised him, payed for his education and was always there for him. Really, he deserved the no brain cell wife he got. There is some growth starting from ep 35 or so. Till then, you want to slap him every single episode.
The eldest daughter: Puh, 30 something and acts like a teenager....can not express feelings, moves with every wind, in whichever direction it blows her, can´t make decisions on her own....would be fine and ok with 16 but so not OK in her 30s.
The ML CEO or whatever: another of those weak male characters, that is almost always present in chinese dramas. They are either overbearing and possessive (for the underage viewer) or weak. Has to do what his STEPmother tells him, even though he fights her in the beginning, as soon, as she is against him dating the FL (eldest daughter) he turns into a weak puddle of mud.
The youngest son: he was very young, so anything that he does is excusable.
Considering, that I had to skip all scenes which included either of the characters mentioned above, it was a quick watch.
Typical stretched out Cdrama to the point, where you can skip 10 episodes and nothing really happened and you can follow the storyline just fine.