久到自己都忘记
[jiŭ dào zì jĭ dōu wàng jì]
'Jiu Dao Zi Ji Du Wang Ji' means 'Aged So Long Even I Forgot'. It suggests a passage of so much time since an event or situation that it has almost slipped into distant past or oblivion. A sense of nostalgia, regret, or amazement at how things have changed is implied.