What is the position of Sang Yu II?

The position of mulberry and elm in the west.

The annotation "Sang Yu is late, but it is still full of clouds" says that Sang Yu, the name of two stars, is in the west. Generally speaking, the sun is in Sang Yu, that is to say, the sun has set in the west, and it will be too late to reach the place where Sang Yu is two stars. It is getting late. Now people use it to compare old age.

Appreciating Lotte and Singing the Old is a poem by Liu Yuxi, a writer in the Tang Dynasty. This poem illustrates the author's point of view. The author thinks that although some people are thin, have poor eyesight, are old and sick, they also have rich experience, know how to cherish time and are self-motivated.