The snow is getting heavier and heavier, but the area accommodated by the bluestone is getting smaller and smaller.
Song Fen opened the window and closed it again.
It was cold outside, and someone was knocking on the door, saying that he wanted to come in and ask for a sip of hot tea.
Song Fen's mother opened the door. After the man took a sip of hot tea, he and his mother started chatting. The snow was getting heavier and heavier, and the man seemed to show no sign of wanting to leave. Song Fen's mother said, "The snow is too heavy. Why don't you stay here all night."
Concept: Bluestone and snow are integrated into each other