It is reported that the Chengqian Palace, where Empress Dowager Dong E, the most beloved consort of Emperor Shunzhi, resides, will be repaired and renovated. The entire project is expected to be completed by 2027. At present, the ancient architecture department of the Forbidden City has formulated a protection plan for the civil engineering part of Chengqian Palace and is preparing to hold an expert discussion meeting. Zhao Peng, the director of the Ancient Architecture Department of the Palace Museum, which used to serve as a ceramic museum and a bronze ware exhibition hall, introduced on the 10th that Chengqian Palace is located on the east side of the central axis of the Forbidden City. This area is a typical two courtyard, with a total of 12 buildings. The courtyard is about 50 meters long from north to south, almost a square. The largest main hall has an indoor area of 222 square meters, and the smallest ear room is 28.5 square meters. Chengqian Palace was first built in 1420 and was originally named Yongning Palace. There are few records of repairs during the Ming Dynasty. In the fifth year of Chongzhen in the late Ming Dynasty, it was renamed Chengqian Palace. In the 36th year of the Kangxi reign, which was rebuilt in 1697, "The Chengqian Palace we see today should be basically the same as it was rebuilt in the 36th year of the Kangxi reign. If the repair and renovation were completed in 2027, it would be exactly 330 years after its reconstruction," said Zhao Peng. In the Ming and Qing dynasties, the owners of the Chengqian Palace were more well-known as the favorite consort of Emperor Shunzhi, Lady Dong E, and the mother of Emperor Xianfeng. Since its establishment, the Palace Museum has been used as an exhibition hall and has been used as a historical museum, ceramic museum, and bronze exhibition hall throughout history. "After the establishment of the People's Republic of China, the renovation efforts of Chengqian Palace were further intensified, especially the maintenance and renovation project in 1973. However, at the same time, many changes were made to the appearance at that time, including changes to the eaves, walls, and doors and windows. Zhao Peng said that in the following 50 years, Chengqian Palace also underwent continuous maintenance, and the latest comprehensive maintenance project was carried out in 2019, but it mainly involved the exterior facade of the building, not the interior.". The phoenix and phoenix soft ceiling in Chengqian Palace is an isolated example of the Forbidden City. So, what are the important value carriers of Chengqian Palace that deserve the attention of the ancient architecture protection team? Zhao Peng introduced that the most prominent feature of Chengqian Palace is the painted phoenix and phoenix soft ceiling in the main hall. There are mainly two types of ceilings in the Forbidden City: soft and hard. Soft ceilings, also known as sea covered ceilings, are decorated with colored paintings and patterns mounted on paper or silk frames on the bottom paper of white frames and grates (ceilings); The soft ceiling of the Forbidden City is less than one-fifth of the hard ceiling, and it is mainly concentrated in the six palaces of the east and west. "At present, no complete soft ceiling of the Ming Dynasty has been found, only the Chengqian Palace and Yongshou Palace have fully preserved the soft ceiling of the early Qing Dynasty, which is the longest preserved soft ceiling of the Forbidden City. The ceiling of Yongshou Palace is in the style of a rising and falling dragon, and the Luan Feng soft ceiling of Chengqian Palace is an isolated example of the Forbidden City, with extremely high value." Zhao Peng said that these precious cultural relics are located in the Ming and secondary rooms of the main hall of Chengqian Palace, and the ceilings on both sides with different styles were painted in 1929. From the perspective of art, the Luan Feng soft ceiling painting style is exquisite, and there is even a technique of reducing dizziness in the white areas of the eyes; The overall composition is full and the proportion is appropriate; The diameter and length of the center of the circle are half of the outer edge of the entire square branch. What other techniques are worth exploring besides surface styles? After several months of in-depth research, the ancient architecture protection team has continuously deciphered: firstly, from the construction method on the back of the ceiling, that is, the simple reed mat can block soil, playing a crucial role in the structural stability of the entire ceiling; Secondly, it looks very