In his deep sleep, Li Nan vaguely heard his mobile phone ringing and was unwilling to wake up. He wanted to sleep well.

There are three unanswered calls, two familiar and one unfamiliar.

The two familiar ones are my mother's landline phone, Lao Xie's mobile phone, and the unfamiliar one is from Beijing.

Regardless of others, Li Nan calls his mother and teacher first.

"South, back to the mountains?"

Her gentle voice, like a bowl of sobering soup after a hangover, refreshed Li Nan: "Well, after seeing off Er Liangzi last night, she came back from Beijing by taxi. I'm tired. You didn't hear me on the phone.

"Knowing you...