有种囚犯叫学生有种监狱叫学校
[yŏu zhŏng qiú fàn jiào xué shēng yŏu zhŏng jiān yù jiào xué xiào]
'Some Prisoners Are Called Students; Some Prisons Are Called Schools': An expression reflecting criticism or dissatisfaction with the educational system, comparing students’ lives under rigid rules of schools to that of prisoners in jails.