I also want to know how to choose the site of building feng shui.
Ding Dian is also known as the "Top of Five Ridges". As the name implies, it has five roofs and four slopes. Look at the Hall of Supreme Harmony.
Xieding Mountain is also called "Nine Ridges Top". From the appearance, the two triangular gables "rest" at the two ends of Ding Dian, just as seen in Tiananmen Square.
The difference between Xie and Xie;
Ding Dian: The roof has four slopes and five ridges. The front and rear slopes intersect to form a transverse positive ridge. The left and right slopes intersect with the front and rear slopes. Four vertical ridges extending obliquely from two ends of the main ridge to four corners of the house are formed. The eaves are slightly upturned. The slopes on all sides have slight concave curvature. Also known as four tops. Before the Tang Dynasty. The spine is short. This slope is deep all around. After the Ming Dynasty, the spine lengthened.
Xieding Mountain: The roof is a combination of a suspended top and a palace top. Two thirds of the mountains are suspended. The next third is Ding Dian. So it formed the shape of four slopes and nine ridges. Each of these nine ridges is a positive ridge. The four vertical ridges on it. There are four Qiang ridges between the four corners and the vertical ridge. (that is, the upper part of the four-slope roof becomes a vertical triangular wall. There is a positive ridge. Four vertical ridges. Forming four ridges. So it's also called nine ridges. )
There are also single eaves and double eaves at the top of the inclined mountain.
Indirect information about Xieding Mountain can be found in the funerary wares of the Han Dynasty and the cave murals of the Northern Dynasty. The physical building was first built in the main hall of Nanchan Temple in Wutai Mountain.
The rank of Xieding Mountain is second only to Di Ding Dian. It consists of one straight ridge, four vertical ridges and four ridges, so it is called Nine Ridges Hall. It also has the form of single eaves and double eaves. In the secondary buildings and residential gardens in the palace, are there any rolling sheds with ridges to rest at the top of the mountain?
Rest on the top of the mountain with double eaves: the rest on the top of the mountain is also called Jiuji Hall. Besides the main ridge and vertical ridge, there are four ridges. The front and rear slopes of the main ridge are full slopes, and the left and right slopes are half slopes. The second eaves on the top of the sloping roof are basically the same as those on the top of the temple. The whole building is magnificent in shape. Second only to Ding Dian with double eaves in rank. At present, Tiananmen Square, Taihe Gate, Baohe Hall, Gan Qing Palace and other ancient buildings are all in this form.
Single-eave Xieding Mountain: Its shape resembles the upper half of double-eave Xieding Mountain. Most halls are of this type, such as the East and West Hall of the Forbidden City.
The gable at the top of the inclined mountain has a wind shield, which is the focus of decoration.
There are also single eaves and double eaves at the top of the temple.
Double-eaved roof: This type of roof is the highest among all roofs in Qing Dynasty. Ding Dian, also known as Si A Ding, has five ridges and four slopes, and has "four outlets", also known as Wuling Hall. The roof of the temple is rectangular in plan, and its width is greater than its depth. The intersection of the front and rear slopes is a positive ridge, and there are four vertical ridges on the left and right slopes, which cross one end of the positive ridge respectively. Double-eaved Ding Dian has short eaves under Ding Dian, and each corner has a short vertical ridge with nine ridges. Among the existing ancient buildings, such as the Hall of Supreme Harmony and the Hall of Changling are the roofs of these halls.
Single-eaved Ding Dian: Its shape is the upper part of the double-eaved Ding Dian, which is a standard five-ridged temple with four Ardins. The main halls of the Forbidden City, such as Tijen Pavilion and Hongyi Pavilion, are equipped with guards.