容嬷嬷的女儿是我班主任
[róng mā mā de nǚ ér shì wŏ bān zhŭ rèn]
'容嬷嬷' is a strict grandmother character from a famous Chinese TV drama. '我的女儿是我的班主任' translates to 'her daughter is my class teacher', implying humorously that this user feels their teacher is as strict and unforgiving as 容嬷嬷, which is meant to show the strict and authoritarian relationship between students and teachers.