What is the relationship between the seven nights in Xuanwu in the north and the Big Dipper?

The Seven Nights in the North Xuanwu and the Big Dipper are astrological symbols in the traditional culture of China, and both represent specific astronomical phenomena.

The seven nights in Xuanwu in the north, including bullfighting, female weakness, dangerous houses and city walls, are all seven nights in the north. Not a specific constellation, but a collection of several star officials. Each star official contains one to dozens of stars, with a total of more than 200.

The Big Dipper, including Shu Tian, Tian Xuan, Tianjing, Tianquan, Yuheng, Kaiyang and Yaoguang, is a constellation in spring, and its arrangement form and direction are adjacent to three bright stars near Polaris in the northern hemisphere, so it is regarded as an important symbol for finding Polaris.

Generally speaking, the seven nights in the north of Xuanwu are not directly related to the Big Dipper. They represent different astronomical phenomena and can be used for divination and prediction.