Xiao Yu carries a cellphone with him, but never gives his number to anyone - including Da Dong and Ya Se. But when he falls in love with Da Dong's girlfriend, An Qi, he gives it to her and tells her to call him whenever she's in need of help. Da Dong eventually finds out that he is in love with An Qi and the three of them become odd against each other, and prefer to rather not talk about their relationship. Their relationship ends with An Qi deciding to return to America. After this, Da Dong and Xiao Yu solve their problem and become friends again. However, Xiao Yu declares that An Qi belongs with Da Dong and not him.
