Pronounced xiǎo qīng xīn, this refers to a style that is "fresh" and "pure," and characterizes a group of people who are knowledgeable and like to embrace an artistic and spiritual way of life.
Xiǎo qīng xīn is thought to be a rebellious approach to the fickle and materialistic world. Such people often hold true to their tastes in music, literature and art, despite mainstream changes. For example, many of them are fond of Lomo cameras, canvas shoes, writer Anni Baby, singer Keren Ann and traveling by themselves.
Though xiǎo qīng xīn has gradually become a particularly fresh style in China, to people who dislike it is merely twee and cutesy.
Let's put it into context:
Phil: Hey Allen, have you heard that Karen is traveling to Nepal next week?
Allen: Sure, she's been dreaming of that trip for months.
Phil: I know, but I'm surprised that she is going by herself. How come she doesn't find a fellow traveler? It's kind of dangerous for a female to visit Nepal alone, I guess.
Allen: Oh, haven't you heard about the xiǎo qīng xīn fad? That's what she's into.
Phil: What does that mean?
Allen: Alright Phil, it's time to learn your lesson. People like Karen are different, you see, and more interested in pursuing a pure, non-mainstream lifestyle. Got it?