What star does the idiom "the stars move" refer to?

I think the "star" of the idiom "stars move" does not refer to a certain star in the sky, but to the other six stars in the Big Dipper except the North Star, which extends to all the stars in the sky except the North Pole.

In ancient times, the observation of nighttime time changes mainly revolved around the Big Dipper, and the other six stars except Polaris revolved around Polaris, thus calculating the time changes. Further observation shows that among all the stars in the sky, only the position of the North Star is relatively static, and other stars are rotating around the North Star.

According to some data, the idiom "the struggle turns to the stars" comes from the third fold of Ma Zhiyuan's "Chen Tuan Sleeps High" in the Yuan Dynasty: "When you sleep in the tomb, you will move to the ancient times, and the stone will rot and the stars will move."

This is a good question, and I am waiting for your comment.

After reading hqe636' s answer, I feel that what I said is really funny: even the Big Dipper and Polaris are confused! What an idiot ~ The "star" of "shifting stars" should refer to the Big Dipper first, because the most direct observation (visual observation) is that the Big Dipper revolves around the Polaris and then develops to all the stars in the sky except Polaris.