已满十八点此进入戴好耳机

What does this sentence mean? Let Mu Qingyu make arrangements for him, this is obviously the rhythm that he wants to live with Mu Qingyu. Lu Feng turned back and glanced at Mu Qingyu. Alas, after all, he and she were not real boyfriend and girlfriend. It was normal for Mu Hongjing to misunderstand her....