The last sentence.
This poem describes the moonlit night of Qinhuai. Pushuo is confused, restaurants and night markets are prosperous, and string songs are everywhere. However, the world is declining, and indulgence in singing and dancing has become a trend. Business women only know how to entertain guests, but they do not know that the previous dynasty was destroyed. Lessons? The warning of the poem lies in the contrast between "not knowing" and "still singing". The poet looks at current events with a cold eye, observes the intoxicated with a clear eye, and satirizes reality with history: the decline of many dynasties was unknowingly caused by people's drunkenness and carefree enjoyment. The ancient city of Jinling beneath our feet has witnessed many such stories of national subjugation!
This is a poem inspired by the scene. By describing the feelings of what he saw and heard when he stayed in Qinhuai at night, it reveals the decadent life of the rulers of the late Tang Dynasty who indulged in sex, drunkenness and dreams. Both sides of the Qinhuai River were prosperous places during the Six Dynasties, a place where the rich, powerful, poets and poets indulged in sex and had fun. The poet moored in Qinhuai at night. Under the vast sandy moon and misty smoke, he saw the feasting and feasting, and heard the obscene songs. He couldn't help but feel emotional about the scene, and suddenly thought about the death of his family and country. He closely combined the chanting of history with the thinking of reality, and learned from Chen's debauchery. The National Association thought of the fate of the late Tang Dynasty under the moon. The whole poem embodies emotions in the scenery, with a sad artistic conception, deep and implicit emotions, and refined language. Shen Deqian called it a "swan song".