有一种囚犯叫学生有一种坐牢叫读书
[yŏu yī zhŏng qiú fàn jiào xué shēng yŏu yī zhŏng zuò láo jiào dú shū]
'There is a kind of prisoner called student, there is another type of imprisonment called studying.' This expresses the view of many students regarding school as being like a prison, where 'studying' symbolizes losing freedom and being confined in life during education. It reveals how stressful schooling can be, especially the heavy pressure brought by tests and assignments.