Looking at the ratings of this drama mine is going to be an extremely unpopular opinion, sorry.

This drama felt like a big advertisement for teenagers on how their lives need to play out.
If you're a teen in high school you can have a crush, but don't go further!! focus on your studies and wait. Oh, you're 18 now? it's ok then, you can have a relationship. You finished your degree? you need to get the best job ever immediately and be super successful very young, be able to afford a house and not long after marry and start a family. It's almost fuel for depression.
The timings on when the characters were allowed or not to do something were super on the face, and they tried very hard to make the main two characters flawless in their upbringing, studies and manners.
In fact only Guan Fang has a more nunanced life, but it's put there as an example of what someone that gets into trouble needs to do, but they don't even dwell on how he did it, he just did because he looked at his grandma one day. It's very superficial.

I found the main female character quite annoying at times (some others I enjoyed her sassyness) and overall there is really no character progression for any of them, so as a result even when in the end they're in the wedding they look like 16 year olds getting married, I found it super weird. You also don't get to know them individually, not even the main characters (only Su Zai Zai and Guan Fang a bit more maybe), so you don't really know anything about them, only that they're friends and they're all ok successful people. Their specific traits are quite superficial so they're not that distinguishable ones of the others really, they work mostly as quirks since they don't impact much on how they act or what they do. Even when Jiang Jia didn't know what she wanted to study is solved quickly with very little hesitation. Zhang Lurang tells me in the end he has changed so much, but other than the fact they told the actor he could now smile more, I don't see any other change. He says he had low self-esteem, and while it's shown him not being treated very well as a teen by his mother I didn't see at any point him seeming to have low self esteem, I only saw him being serious and quiet and it's not the same.

As it happens many times I found the friends romantic relationship more interesting, that is until they decided to completely push it to the side and only resolve it quickly after the time jump. Time jumps also mean nothing here anyway, none of them change at all and whoever else they meet they only stay in their lives for like 5 seconds anyway. Very choppy.
Plot was boring at times (and I like slice of life) and most of the dialogue was very superficial, what is not necessarily terrible but then you had more poetic lines in specific crafted moments that were taking me again to the feeling of massive advert.
Many side characters appear only at weird moments and then in others when you would expect them to appear they don't.

Points go for the cute moments here and there, but overall this was a big miss for me.
I've watched chinese movies before but this was my first chinese series, and considering the high rating of this compared with my opinion of it I'm not sure I should try any other series maybe :/