The book ends exactly at EP34, right down to the last line; minus all the extra scenes added and the misunderstanding…
Because of there was no misunderstanding in the novel that's why it was the end in there.
In the novel, shi yi decided to go abroad willingly, there was no misunderstanding between them.
But in drama they put the misunderstanding to separate them, if they didn't create the new misunderstanding in the drama, shi yi would never leave for abroad so suddenly.
Ep 35 - 36 is actually happy. Shi yi teases her just like before. Also in ep 35 there is a little emotional moment…
Don't know. Shen dou said her in the phone that she and shi yi are together and shi yi moves on so he doesn't pick her calls. But in the end of the proposal shi yi said he never had a girlfriend. So may be not. May be shen dou lied.
Will we get happy moments between the couple in ep 32-35? Or only last ep? :(
Ep 35 - 36 is actually happy. Shi yi teases her just like before. Also in ep 35 there is a little emotional moment when they are singing (song - do you know i am waiting for you) together in the car and then the flashback of their memories...
3 
In the novel, shi yi decided to go abroad willingly, there was no misunderstanding between them.
But in drama they put the misunderstanding to separate them, if they didn't create the new misunderstanding in the drama, shi yi would never leave for abroad so suddenly.
Ep 33 : Mission - clear all misunderstandings.
Ep 34 : let's create new misunderstandings.
Their first trip : ep 6 - ep 8
College : ep 9 - ep 34
Working life : ep 35 - ep 36
No you can't skip any things . And their school part is the best.
But in the end of the proposal shi yi said he never had a girlfriend. So may be not. May be shen dou lied.
You can say ep 33 is like "The clam before the storm"
https://dramacool.pe/drama-detail/summer-is-the-coldest-season-2020
It is only about 18 min here (actually it is about 30 min in mgtv but you have to pay for it. )
Better quality special ep - https://www.olevod.com/index.php/vod/play/id/29111/sid/1/nid/25.html