So at that time, the former dynasty was composed of three halls, namely Hall of Supreme Harmony, Hall of Zhonghe and Hall of Baohe, and the harem was composed of two halls, namely Gan Qing Palace and Kunning Palace, which were mainly even.
Then, why did Jiajing Emperor build this Jiaotai Hall between Gan Qing Palace and Kunning Palace? It is said that this was related to Ming Taizu's belief in Taoism at that time. Because, after middle age, this Ming Yingzong wants to live forever, so he worships Taoism.
According to the Taoist Eight Diagrams of Zhouyi. Doing it in front of Kun is a negative divination. And Kun is doing it above and doing it below. According to this divination, Ming Yingzong calculated that Gan Qing Palace in the Forbidden City is in front and Kunning Palace is behind, which is one of the worst divination calculations in the 8864 divination in the Book of Changes.
In this way, of course, Ming Yingzong will correct this negative divination. what should he do ? We can't move Gan Qing Palace and Kunning Palace, so Ming Yingzong finally added a palace between Gan Qing Palace and Kunning Palace, which is the origin of Jiaotai Palace. After the completion of this hall, due to the change of the overall geomantic omen of the Forbidden City, Emperor Jiajing rebuilt all the temples in Beijing according to regulations, and the outer city was also added by half an inch. In this way, the Forbidden City became bigger.
At the same time, after the completion of Jiaotai Hall, the two royal palaces in the Forbidden City became three royal palaces.