In 2020, the first batch of post-90s generation will turn 30 years old. I am thirty, but it is only when I am thirty that I realize that many things have just begun. Maybe you haven't had a stable job, you haven't found your significant other, you haven't taken off your rebellious streak, and the mountain of responsibilities is pressing down on you. The dream is still far away, but the rent is today. Especially young people living in big cities are under greater pressure and have to pretend that everything is fine in front of their families. Forced marriage, hair loss, housing, parents' illness, and possible layoffs sometimes make them breathless. They will be confused and sad, but they will not give up their pursuit of beauty and yearning for love. This book is dedicated to all those born in the 1990s who are about to turn thirty.