The word Weiyang comes from the Book of Songs: "What about the night? The night is still early. " Weiyang: unfinished, not meaningful. Song of Eternal Sorrow: Return to Chi Yuan as usual, Lotus in Taihu Lake, Willow in Weiyang Palace. Tang also had a palace named Weiyang Palace, but this Weiyang Palace was included in Chang 'an, which is a palace in the palace garden.
Lighting at night means going to Weiyang.
Express a kind of sadness