What seemingly scientific knowledge of Feng Shui is hidden in the Forbidden City building?

The Forbidden City is the palace where the royal family lived in the Ming and Qing Dynasties. Located on the central axis of Beijing, it covers an area of about 700,000 square meters. It is one of the largest and best-preserved ancient wooden buildings in the world. There are many scientific places in its construction, such as a thousand dragons spitting water, a hollow "sandwich wall" in the palace wall, known as the "fire wall", and breathable brick carvings on the wall.

The Forbidden City was built by smart construction of many ancient architects. There are many buildings that are both scientific and beautiful, including the very famous "a thousand dragons spit water". This little thing is called cicada, which is a kind of "god beast". Its origin began in the Spring and Autumn Period. At that time, people carved these on the bases and tombstones of jade articles, palaces and tombs. Its characteristic is that it can swallow the river and spit water.

Another amazing thing about the Forbidden City building is that its walls are hollow. This is not because craftsmen cut corners, but because they specially made this kind of wall called "sandwich wall", also called "fire wall". It is very cold in winter in Beijing. There is a fire path under this wall, which can add charcoal from outside the palace. The hot air will warm the whole palace along this wall, and the heat dissipation surface is large, which can warm the whole house.

And the building on the roof of the Forbidden City. The roof of the Forbidden City is yellow, which can not only show the royal style, but also shock the birds. Moreover, the building materials on it are smooth, the roof is wide and decorated with many shapes, so birds rarely stay on it, which greatly reduces the pollution of the roof. People were too smart at that time.