Specific explanation:
1, thinking in a quiet night: thoughts generated in a quiet night.
2. Doubt: It seems so.
3, look up: look up.
These poems are from the ancient poem "Thinking about a Quiet Night" by Li Bai, a poet in the Tang Dynasty. It is a five-character ancient poem, which was written in Yangzhou Inn on September 15th, the 14th year of Emperor Xuanzong of the Tang Dynasty (726), when Li Bai was twenty-six years old.
This poem is about the feeling of missing my hometown on a silent moonlit night.
The first two sentences of the poem are an illusion created by the poet in a specific foreign environment in an instant. On the other hand, the last two sentences of the poem deepen homesickness through the description of actions and ways.