Duke Zhou dreamed of observing others being observed:

The dreamer is often an observer in his dream. Generally speaking, before taking action, it is wise for people to observe a situation or the person involved. Of course, the dreamer cannot forget his actions while observing.
If you dream that you are being observed by others, it means that the dreamer feels that his interests are threatened by others. Of course, it may also mean that your interest in observation has increased to the point of inappropriate voyeurism.

(Editor in charge：Dreams and Health)