9 beams 18 columns 72 ridges refer to the four corners of the Forbidden City wall, each with a beautiful turret. These watchtowers are exquisite in structure, with nine beams, eighteen columns and seventy-two ridges. These exquisite and colorful turrets were built in the Ming Dynasty and handled very skillfully. Large and small structures are intricate and ingenious, which fully shows the wisdom and talent of the working people in the motherland.

The tower is located on Mount Sumi, surrounded by a stone fence. There is a square pavilion in the middle, three rooms wide, three rooms deep and one room with light on all sides. The terrain near the outside of the city wall is relatively cramped, while the terrain inside the city wall is relatively open, and the plane and the midpoint cross into a cross, which contains the intention of curved-foot architecture, making the turret and the city wall two completely different architectural forms, and the two are organically linked.

the Forbidden City

The Forbidden City (Beijing Forbidden City) generally refers to the Forbidden City in Beijing.

The Forbidden City in Beijing is the imperial palace of China in Ming and Qing Dynasties, formerly known as the Forbidden City, located in the center of Beijing's central axis. The Forbidden City in Beijing is centered on three halls, covering an area of about 720,000 square meters, with a construction area of about10.5 million square meters. There are more than 70 palaces and 9000 houses.

The construction of the Forbidden City in Beijing began in the fourth year of Yongle (1406), based on the Forbidden City in Nanjing, and was completed in the eighteenth year of Yongle (1420), becoming the palace of twenty-four emperors in Ming and Qing dynasties. On the 14th National Day of the Republic of China (1925 10/0/010), the Palace Museum was formally established and opened. The length of the Forbidden City in Beijing is 96 1 meter from north to south and 753 meters from east to west. Surrounded by a wall with a height of 10 meter, there is a moat with a width of 52 meters outside the city.

There are four gates in the Forbidden City, the meridian gate in the south, the Shenwu gate in the north, the Donghua gate in the east and the Xihua gate in the west. There is a graceful turret at the four corners of the city wall, and there is a folk saying that there are nine beams, eighteen columns and seventy-two ridges to describe its complex structure.