This seems C-drama specific, but is it common in China to demand that people treat you to dinner? When people first meet, when something good happens to a friend (like new job, money, girlfriend/boyfriend, etc.) the characters are always demanding that the other person takes them out to dinner. Where I am this would seem like the height of rudeness to the point where I’d probably distance myself from the friendship.
More generally in all Asian dramas, people are ALWAYS eating out. They can be broke students and they’re still eating half their meals in restaurants. I’ve heard that in places like Tokyo this really is common because the apartments are so small, but even broke people survive on convenience store onigiri before they’d ever consider cooking rice at home. Make it make sense! Even in established adulthood I’d struggle to afford eating out at a table service restaurant every day–here that would run $25 or more per person.
And the drinking. THE DRINKING. Is it common to drink to the point of passing out or not remembering what happened? I have literally never done this.