一个上边添一个下插

He didn't care about his cell phone. There was a phone in the dormitory anyway, but he didn't expect that Ruolan would need a phone after graduation. When he called Ruolan before, he always called her dormitory, or to Dai Xin, Ruolan's classmate in the same dormitory. Ruolan never ran around and he could find her every time he looked for her. He didn't even think of buying a mobile phone for his sister....