Why does Zhou Shuyi only play with Luo Xin?

Zhou Shuyi only plays with Luo Xin because they are good sisters. Luo Xin and Zhou Shuyi are undoubtedly famous figures in League of Legends. They are not only the host of fighting fish, but also the signing anchor, and they can often see their direct dynamics and wonderful interaction. Luo Xin and Zhou Shuyi have a good relationship. Judging from Zhou Shuyi's evaluation of Luo Xin, she knows Luo Xin very well. After all, she used to be a sister on the same stage.