What are the main differences between China Zhouyi and western astrology?

For the time being, we think that Zhouyi here refers to Zhouyi divination.

Divination in Zhouyi is the main theme of eastern divination, that is to say, all eastern divination uses the same theory: Yijing.

Western astrology is an independent ideological system, although western divination has common meanings, such as the theory of four elements and Kabbalah. Its close relationship is completely after Zhouyi.

To give an inappropriate example,

An oriental fortune teller can do other divinations with a little guidance.

Just because a western fortune teller has only learned one of them does not mean that he will know the other.