In this short scene, Lui introduces himself as a student of Caixing, and tells the audience that he is Caixing's "brother" and "sister" . He then introduces Caixing as "the most serious one" , and says that both his sister and his friend are "so interesting." He also says that he thought Caixing came to visit him when he saw him, but that Caixing is "gratiously courting death" for disappointing him. Lui then tells Caixing to cut off all contact with him and ulla. He says he will befriend both of them, too