Wen Xin is the biological daughter of Wen Baixiang and Lin Yun. She is a math prodigy, having skipped grades and been admitted to Peking University early. She is proud, hot-tempered, and looks down on Wen Li. She openly questions Wen Li's motives and ability to attend No.1 Middle School. She is jealous of her father's attention and feels threatened by Wen Li's return. She is often suppressed by her father but remains defiant.
