C106 Argument

Ann Qianxi dialed Prof. Du's cell phone. After the phone rang a few times, a slightly unfamiliar voice came over.

"Hello, may I ask who you are?"

"Ann Qianxi, Prof. Du, do you still remember me?"

"Oh!" Ann Qianxi? You must be that tall and thin girl from back then. I haven't seen you for so many years. There was a touch of surprise in his voice