Similar Faces but Different Smiles

The good girl Yang Chenxi was entrusted by her class teacher to help the unruly and handsome boy Ye Zhiqiu improve his studies. From Ye Zhiqiu's unappreciative attitude at the beginning to his active cooperation later, the two began to have a tacit understanding in their hearts. However, a car accident left Yang Chenxi missing and her life or death uncertain. Two years later, Ye Zhiqiu saw a familiar figure on the university campus. Was it her? Similar face, but the smile at the corner of her mouth is no longer the same as it was then. Is this woman named "Yang Xingchen" the same Yang Chenxi who pushed him away without hesitation when the car drove over? Conception: