China folk dawn is backed by Venus, why is it meticulous in the evening?

The morning star is Venus. Venus was also called Venus or G star in ancient China. What appears at dawn is called the morning star, and what appears at dusk is called the evening star. Venus can only be seen at dawn or dusk because its orbit is in the earth's orbit. It is impossible to see Venus or Mercury at midnight.

Venus and the sun have a maximum viewing angle of no more than 48 degrees on the earth, so Venus will not appear in the night sky all night. In our country, people call Venus at dawn the morning star and Venus at dusk the evening star. Venus rotates slower than revolution, but in the opposite direction, so the year on Venus is getting shorter and shorter. The sun seen on Venus rises in the west and sets in the east.