An Jie is Qin Sang's younger brother. He is a sweet and innocent child who is seriously ill and requires a bone marrow transplant and later emergency surgery costing two million yuan. He lives in the hospital and is deeply attached to his sister. He calls Chu Mobai "brother-in-law" when Chu visits, showing his eagerness to see his sister happy. He often feels guilty for being a burden to Qin Sang, but she reassures him that he is the best gift left by their parents. He has bright eyes and a gentle demeanor. His condition worsens suddenly, triggering the main conflict of the story.