Introduction to Duanmen: Duanmen is the tower behind Tiananmen. It was built in the 18th year of Yongle in the Ming Dynasty (1420). It is one of the main entrances to the Forbidden City in the Ming Dynasty and the main entrance to the Imperial City in the Qing Dynasty. The entire architectural structure and style are consistent with Same with Tiananmen. During the Ming and Qing dynasties, Duanmen Tower was mainly used as a place to store the emperor's ceremonial supplies. Whenever the emperor travels, there are various types of ceremonial guards on both sides of the imperial road under the city tower. They are huge in number and the procession is magnificent. They line up from the Hall of Supreme Harmony to Tiananmen (called Chengtianmen in the Ming Dynasty), which is two miles long. During the Republic of China and after the founding of New China, the Duanmen Gate Tower served as the cultural relics warehouse of the History Museum. In 1999, the Duanmen Gate Tower was officially opened to tourists after relocation of cultural relics, lacquer paintings and other renovations. Currently, the "Hundred Emperors Exhibition" and "Hundred Emperors Exhibition" are displayed in the main hall of the tower. Celebrity Calligraphy and Painting Exhibition, etc." is a worthwhile trip for tourists who like ancient Chinese architecture, Ming and Qing gardens, calligraphy and painting art.