The mica screen has deep candle shadows, and the long river gradually sets and the stars describe the dawn period. This poem comes from "Chang'e" written by Li Shangyin of the Tang Dynasty. The whole poem is: The candle shadow on the mica screen is deep, the long river is gradually setting and the dawn stars are sinking. Chang'e should regret stealing the elixir, and her heart will be filled with blue sea and blue sky every night.
The translation is that through the screen decorated with mica, the shadow of the candle gradually dimmed. The Milky Way also disappeared quietly, and the morning stars sank in the dawn light. Chang'e in the Moon Palace probably regretted stealing Hou Yi's elixir of immortality. Now only the blue sky and blue sea accompany her lonely heart every night.
The "Dawn Star" in the second sentence refers to the morning star or morning star, which appears in the east in the early morning. Dawn therefore fits this poetic description.