I remember the scene where he punches and kicks him. But in the trailer he does it in front of sang zhi. It’s a different scene. I’ll try to find it and post the link here.
Wasn’t there a scene where the couple is out together, and the brother comes and punches duan jiaxu? I remember it from the trailer, but didn’t see it on the drama.
No sense!! So much time was given for the second couple in the beginning , while the main one had no romantic interaction for 9 episodes. And after so much screen time, there was nothing in the end. They should have given that time for the main characters. It was wasted screen time.
Is there any unnecessary drama that might make the main couple break up in the end? Wanted to start watching today, but only if they have a happy ending.
News 
So much time was given for the second couple in the beginning , while the main one had no romantic interaction for 9 episodes. And after so much screen time, there was nothing in the end. They should have given that time for the main characters. It was wasted screen time.
Thank you for the sub tip. I’ve dropped many dramas because of bad subs.