C1746 Goodbye Feng Er

"It's the sound of the train. . . "

Lin Xi's ears twitched. He could tell that it was the sound of a train passing by when they entered Qingyi Lane.

The little girl also turned around to look at the source of the sound. She explained, "There is a railway behind the city wall. Every month, there will be a green carriage passing by. It seems like it is transporting coal. .