班主任就是容嬷嬷的替身呢
[bān zhŭ rèn jiù shì róng mā mā de tì shēn ní]
The username compares a strict teacher (class adviser) with Rong Moma, a stern governess character from the TV drama 'My Fair Princess.' Here the user implies that their teacher has very strict, authoritative ways like this classic figure does.