Several of his poems have this feeling.
mulberry leaf harvest
Warm curtain roll of drawing room lamp,
Don't reveal tintin.
The rain stopped coldly,
I never dreamed of going to the west window overnight.
Jade moths began to add fragrance,
Leaning against the lonely screen.
Silent and affectionate,
Who plays the flute when the water is adjusted?
Magpie stepping on branches
Where will the clouds go in a few days,
If you forget to go home, you will die in spring.
White grass Hua Qian cold food road,
Whose tree is the car tied to?
Tears lean on the floor and talk alone,
Shuangfeiyan, meet a stranger?
Arouse spring sorrow like catkins,
There is nowhere to be found in the long dream.
Bai Juyi's Song of Eternal Sorrow also contains the distance between life and death year after year, but no beloved soul has visited his dream.
Do you remember whose poem this is?