唱着曾经的歌哼着曾经的调
[chàng zhe céng jīng de gē hēng zhe céng jīng de diào]
Translating to 'Singing the songs of old, humming the tunes of the past', this implies the user holds nostalgia for bygone days, reminiscing fondly about things they loved and perhaps people they once knew. It can evoke images of someone cherishing old melodies, reflecting a longing for simplicity and familiarity of memories.