At the beginning of the class, there was a man in his early thirties standing at the back door, dressed in ordinary clothes, holding a pen and paper, and the students thought it was a staff member of the school or a working graduate student.

Because of the wind, there are several outside the classroom, which is about the same age.

He didn't come in, but stood at the back door, listened for a while, remembered, and didn't speak, but was quiet. The students thought he was taking notes, and they didn't care.

That's it

"Live Treasure Appraisal, I Became a National Treasure Expert? Chapter 168 This is in trouble, I am in the middle of a hand, please wait a moment,

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