It’s like this when the pear blossoms fall and the moon turns to the west. It means once we are separated, just like this, when the pear blossoms have finished falling and the moon is already in the west of the sky, I realize that I have missed it. you. This poem vividly depicts a scene of separation, using the falling pear blossoms and the position of the moon to imply the passage of time and the desolation of separation. At the same time, "Youxi" implies that this separation is not the first time, but a miss and separation again and again. The whole sentence is full of helplessness and regret for the separation.