 When Wei begins teaching , she has little rapport with the students : they shout and run around instead of copying their work , and the class troublemaker , Zhang Huike , insists that " she 's not a teacher , she 's Wei <unk> 's big sister ! " After putting the lesson on the board , Wei usually sits outside , guarding the door to make sure no students leave until they have finished their work . Early in the month , a sports recruiter comes to take one athletic girl , Ming <unk> , to a special training school ; unwilling to let any students leave , Wei hides Ming , and when the village mayor ( Tian <unk> ) finds her , Wei chases after their car in a futile attempt to stop them . 
