多擦几次黑板就毕业了
[duō cā jĭ cì hēi băn jiù bì yè le]
'Graduate after wiping the board a few more times.' This reflects nostalgia for school days or a longing for a simpler life, possibly implying that the mundane routines like erasing the blackboard are all part of growing up and eventually lead to significant life transitions such as graduation.