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 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). It is a rectangular city with a length of 96 1 m from north to south and a width of 753 m 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.

The architecture of the Forbidden City is divided into two parts: the outer court and the inner court. The center of the outer court is the Hall of Supreme Harmony, the Hall of Zhonghe and the Hall of Baohe, which are collectively called the three halls, and are the places where the country holds ceremonies. The center of the Forbidden City is Gan Qing Palace, Jiaotai Palace and Kunning Palace, collectively referred to as the last three palaces, which are the main palaces where emperors and empresses live.

2. Terracotta Warriors

Terracotta Warriors and Horses, namely the Terracotta Warriors and Horses of Qin Shihuang, are the first batch of national key cultural relics protection units and the first batch of Chinese world heritage. They are located in the Terracotta Warriors Pit 1.5 km east of Qin Shihuang Mausoleum in Lintong District, Xi City, Shaanxi Province.

Terracotta warriors and horses are a category of ancient tomb sculptures. In ancient times, human sacrifice was practiced, and slaves were accessories of slave owners before their death. When they die, the slaves will be buried with the slave owners as sacrifices. Terracotta warriors and horses were made into sacrifices in the shape of troops (chariots, horses and soldiers).

3. The Great Wall

The Great Wall, also known as the Great Wall of Wan Li, was an ancient military fortress in China. It is a tall, solid and continuous long wall, which is used to limit the enemy's actions. The Great Wall is not a simple isolated wall, but a defense system with the wall as the main body and a large number of cities, obstacles, pavilions and landmarks.

The history of the construction of the Great Wall can be traced back to the Western Zhou Dynasty, and the famous allusion "bonfire drama princes" occurred in Haojing, the capital (now Xi 'an, Shaanxi) originated from this.

During the Spring and Autumn Period and the Warring States Period, countries competed for hegemony and defended each other, and the construction of the Great Wall entered its first climax, but the construction length at this time was relatively short. After Qin destroyed the six countries and unified the world, Qin Shihuang connected and repaired the Great Wall of the Warring States Period, which was called the Great Wall of Wan Li. The Ming Dynasty was the last dynasty to overhaul the Great Wall, and most of the Great Wall seen by people today was built at this time.