Your question is rather silly, like asking a question about the mysterious geomantic omen, it's also like asking a question about astronomy (such as the distance between each star and the earth, the running track of each star, and the running speed of each star). Astronomy is not my strong point, so I don't care. I have studied the mysterious sky for many years to analyze and answer it:
According to the online users, One white wolf, two black giant gates, three green Wen Qu, four green, wuhuang Lian Zhen, six white Wu Qu and seven red Pojun, these seven stars are called the Big Dipper, while there are two stars between Pojun and Wu Qu in bucket handle, one of which is right-handed, one is common for Zuo Fu, and the left-handed is ranked eighth, and the right-handed is ranked ninth, with seven stars matching two stars. Astronomically, it should be called' constellation' ... for example, the Big Dipper is called Ziwei in the number of purple fights, and Lian Zhen in the sky. In western astronomy, it is called Ursa minor. Because its nebula is a little purple, China people have these names, so the stars know it and turn around. So don't make a mistake and think it's a star.
Another question is, why do you fly in China with this rule? Because in the Eight Diagrams of the Book of Changes, the northwest is the stem, the stem is the sky, the father is Lao Yang, the number is six, the exchange is seven in the west, eight in the northeast, nine in the south, and the hurdle is the water. Later, the southwest of Kunming, the East Earthquake, the lost four, and the return to the palace, for example, five into the middle, which is to fly forward, that is, Yang, forward; On the contrary, it is cloudy, for example, three main trees appear in the west but not in the east, or eight trees appear in the northeast but in the southwest of Kunming ... and so on, all of which have their own rules, not misplaced.