故人苑怨故人
[gù rén yuàn yuàn gù rén]
'Gu Ren Yuan Yuan Gu Ren': Roughly translated to 'Complaining Garden of Old Friends' where 'gu ren' stands for 'old friend'. It suggests someone is recalling the resentment they hold against old friends or reflecting on bitter feelings or unresolved issues from past friendships.