At the age of 21, during her junior year of internship, Niu Ruyu met Shu Yu, a man who would remember her love of drinking room temperature water. Five times in three years, she pushed him away with "we are not suitable". He didn't hold back for the last time. Reunited four years later, she thought he was still the same boy who would sit in People's Park all night. But what he handed over was no longer tissues and water, but an old notebook filled with Wang Yangming's inner learning. "The sense of security is not given by others, it is grown by oneself." But she also hides a secret - the truth that her second sister was sold to the mountains of Sichuan by her mother pierces her heart like a thorn. When the lid of suspense was lifted, she finally knew what her mother's words "I'm sorry for her" meant. The Wutong trees in Chengdu, the ice powder on Yulin Road, the Gesang flowers in Sansheng Township, and the Border Collie called Latte. A story about a girl who "doesn't deserve to be loved" and learns to love herself