Caiyin (played by Jin Shanya) is a shrewd and shrewd female police officer. Due to her mission to investigate the gang, she has to return to campus and become a high school student. Having been away from campus for many years, Caiyin's knowledge level certainly cannot keep up with others, and she always protects herself from being seen through. A senior sister in the class, Huiling (played by Hong Xiuer)
Caiyin (played by Jin Shanya) is a shrewd and shrewd female police officer. Due to her mission to investigate the gang, she has to return to campus and become a high school student. Having been away from campus for many years, Caiyin's knowledge level certainly cannot keep up with others, and she always protects herself from being seen through. A senior sister in the class, Huiling (played by Hong Xiuer)