Question:  "what U need?"  is a single, recorded by which Chinese singer, for his debut extended play "Lose Control" , Zhang Yixing (born (1991--) 07, 1991 ), better known by his stage name, which is?
Sentence (from "Lay (entertainer)"): Zhang Yixing () (born (1991--) 07, 1991 ), better known by his stage name Lay (Korean: 레이 ), is a Chinese singer, songwriter, record producer, dancer, actor, model, author and voice actor.
Relevant evidence: Yes