The Crescent moon is divided into the first quarter moon and the second quarter moon. This is because the position of the sun, the earth and the moon changes constantly, and the phase of the moon changes in profit and loss.
In Chinese culture, the first quarter moon and the second quarter moon are common images in poetry. Generally speaking, the first quarter moon symbolizes good emotions such as hope and expectation, and the second quarter moon indicates lonely mood such as loneliness and Acacia.
In love, the first quarter moon is mostly used to represent the moon. Even if it is incomplete, it will come back after it is missing. It is used to borrow the meaning of love that love will slowly usher in happiness after a trough.