On the seventh day of the end, there were three knocks on the wall next door.
Xu Liguo knocked back three times. A woman knocked on his door.
She is very light and white, with a red line on the back of her hand.
She said: I will die. But you can live.
Later, the gray tide came. White piles line a path leading to the black gate to the north.
Each time danger loomed, she would rap it three times with her knuckles.
Three times. Not a code. It was proof that she was still alive.
There was a final knock on the door.
The door closed.
Xu Liguo waited outside the door for a long time.
No fourth down.
The first part of this book: a total of three seasons and about 150 chapters.
Theme of the first season: In the face of irresistible fate, the only thing people can do is to leave a mark in each other's lives. Even in the end, even that mark will be erased.
