Why did the ancients call "Beijing City" the "Forbidden City"

The Forbidden City was the palace of 24 emperors in China during the Ming and Qing Dynasties. After the third emperor of Ming Dynasty seized the throne, Judy decided to move the capital to Beijing, that is, began to build the Forbidden City Palace, which was completed in the 18th year of Yongle in Ming Dynasty (1420). According to China's ancient astrology theory, Ziweiyuan (i.e. Polaris) is located at the zenith where the Emperor of Heaven lives, corresponding to heaven and man. According to the emperor's residence, it is also called the Forbidden City.

The Forbidden City [1] is located in the center of Beijing. It is now called the Forbidden City, which used to mean the Palace. The Forbidden City in Beijing is the imperial palace of the Ming and Qing Dynasties, and it is also the largest, grandest and best-preserved ancient palace and ancient architectural complex in the world today. Among them, the Hall of Supreme Harmony is the highest and most brilliant, and grand ceremonies are held here for the emperor's accession to the throne, wedding, canonization, command and expedition. The most famous in the Forbidden City is hall of mental cultivation. There are two Forbidden Cities built in the Ming Dynasty, one in Beijing and the other in Nanjing.

Beijing is the city of Beijing. The Forbidden City is the imperial palace.