Cheng Yu, in her beautiful moment geometry, was a classmate and friend of the hostess Lin Hangjing when she was studying, and later co-founded a girls' school with Lin Hangjing. The Beauty of Knowing Geometry is an emotional drama directed by Chung Shu Kai and starring Shawn Dou and Chen Douling. Cheng Yu is played by Fan Zhixun, an undergraduate in the performance department of Beijing Film Academy.