What is the ending of the novel "The Woman Teacher in the Mountain"?

This is an advanced novel. I thought that in the end, Bai Jie finally followed Wang Shen back to her hometown. Senior one or the principal is just choosing other goals. Sun Xi didn't get divorced in the end, and the couple just played their own games. Only Sun Xi's michel platini passed away, and Chairman Gao had a happy ending. Even the mountains are planted with green trees, which is brand new.

Only Mr. Bai is still fighting alone. He is truly selfless. Miss Bai is the only teacher in the school, responsible for the education of the students and the affairs of the school. In such a poor village, reading is the only way out and the only hope for children. Teacher Bai knows this well, which is why he devoted his life to the front line of education. We must find a way out for the children in mountainous areas and find hope for the future. In other words, he propped up the hope of a village by himself. A large number of young people go out to work, see the outside world and understand the gap between themselves and the outside world, thus promoting the local economic development. Going out to work also needs a certain cultural foundation, and this cultural foundation is the contribution of Teacher Bai.