What's the relationship between little bitch and brother xing?

1, Xiao Jian and Xingdi are the original music groups of the post-90s generation and the leading figures of online singers.

2. Their first album of the same name, The Star Flute and Xiao Jian, contains 13 songs written by them. Brother Xing and little bitch, sometimes two people, sometimes one person. When there are two people, one is Star Emperor and the other is Cheap. When there is 1 person, it is after 90. Most of the post-90s generation have such characteristics: external melancholy and internal casualness are as mysterious as they are, but they are also a real mess.