Number seven, Shen An.
Number seven, the last name waiting in the red triangle door.
Number seven is the last stroke carved on the wall by Chen Sui, leader of the third resident group at the bottom of the shaft.
Number seven, someone counted the other six names in the dark for six full years.
Shen An never told anyone that there was another person living in her body, a person who remembered all the pain for her, never cried tired, and never disappeared. Her name is Shen Yu. The latter is her substitute, a soul born in the bloody night when she was seven years old.
Shen An was twenty years old when the end of the world came. She escaped from the university campus with the wishes of her classmates, Lin Yi and Song Huai, and entered the "Seventh District", a survivor base renovated from Binhai No. 3 Middle School. There are classrooms, canteens, playgrounds and a newly transplanted osmanthus tree. There is also Zhou Yuan Mountain there, and a red triangle door hidden deep underground in the administrative building.
The door is closed with number one: Lin Tingwan.
He stayed in the darkness for six years, living like a breathing stone.
He was waiting for someone to come, waiting for a number to be erased from the wall, waiting for someone to remember for him that he once had a name.
"The seventh one." He counted to seven and stopped inside the door. "It's your turn."
Intention: People who are remembered will not disappear completely.