What do the three halls in the former dynasty and the three palaces in the later dynasty of the Forbidden City refer to?

(1) The three great halls of the former dynasty are located on the high earth-shaped Sumeru, 1, and the Hall of Supreme Harmony is located in the south of the earth-shaped Sumeru, which is the largest existing palace building in China. The word "Taihe" comes from Zhouyi Ganhai Ci: "ever-changing, each for life, and harmony is beneficial." "Too" means greatness, and "harmony" means harmony. 2. Zhonghe Temple is located in the middle of the earth-like Sumi Mountain. Baohe Hall is located on the back of the earth-shaped Sumi Mountain. . The word "Baohe" is homophonic with the Hall of Supreme Harmony. As a monarch, we should keep the harmony between man and nature. Maintain the balance of everything. (2) The third house in the back bedroom: 1. Gan Qing Palace is the main hall of the palace and one of the third palaces of the palace. Gan Qing Palace is the largest building in the Forbidden City. Fourteen emperors of Ming Dynasty and two emperors of Qing Dynasty, Shunzhi and Kangxi, all lived in Gan Qing Palace, where they also handled their daily affairs. Jiaotai Palace is one of the last three palaces in the Forbidden City, which is located between Gan Qing Palace and Kunning Palace. The name of the hall is taken from the Book of Changes, which means "heaven and earth are in harmony, and Kang Tai Le". It was built in the Jiajing period of the Ming Dynasty, rebuilt in the 12th year of Shunzhi (1655) and 8th year of Kangxi (1669), and rebuilt in the 2nd year of Jiaqing in 2007 (1797) when the Gan Qing Palace caught fire. Kunning Palace Kunning Palace is one of the last three palaces in the Forbidden City in Beijing. It was built in the 18th year of Yongle (1420), the 9th year of Zheng De (15 14) and the 24th year of Wanli (1596) in the Ming Dynasty, and was destroyed by fire twice. In the second year of Qing Shunzhi (1645), it was rebuilt again in the twelfth year (1655), imitating the Qingning Palace in Shengyang, Shengjing. In the second year of Jiaqing (1797), a fire broke out in Gan Qing Palace, and in the third year (1798), the front eaves of this temple were burned and rebuilt. Gan Qing Palace stands for masculine, while Kunning Palace stands for feminine, symbolizing the combination of Yin and Yang and the unity of heaven and earth.