Moonlit Night is a seven-character quatrain written by Liu, a poet in the Tang Dynasty. This poem describes the author's unique feelings about the warming of the moonlit night in early spring. The first two sentences of the poem describe the scenery, the setting of the stars and the moon, and the dead of night. The last two sentences of the poem were remembered, heard and felt, because the sound of insects came through the screen window and I felt the warmth of spring. The poem depicts a beautiful, quiet and vibrant realm, which makes people feel that phenology is changing, quiet and beautiful.