班主任是容嬷嬷的继承者们
        
            [bān zhŭ rèn shì róng mā mā de jì chéng zhĕ men]
        
        
            'The class teacher is the successor of Concubine Rong'. This references a strict mother-in-law figure (from Chinese period dramas), used sarcastically for authority figures in a school setting