What are the poems about Wen's return?

When you ask about the return date, it's hard to say, evening rain, Manqiuchi. When * * * cut the candle at the west window, but talk about the rain at night.

This poem by Li Shangyin in the Tang Dynasty has both autumn sadness and warm scenes of missing. Among them, the overlapping words highlight the author's lingering feelings and have a strange idea.