Xiyuan is located outside Xihua Gate, which is the Xiyu Garden in the Yuan Dynasty.

"To the west of Xihua Gate is Xiyuan. It is called Xiyuan Gate, and the entrance is Taiye Pool." "Since the Jin Dynasty, it has been called Xiyuan Taiye Pool. Famous sites such as the Guanghan Palace on Qionghua Island have historically

From the Yuan Dynasty to the Ming Dynasty, the interests of the garden and the pool were not changed, but they were only used for recreation." In other words, the Xiyuan was a place for the emperor to play, with palaces, pavilions and Taiye Pool complementing each other, creating a magnificent scenery.

It was further developed in the Qing Dynasty and became a place where the emperor summoned princes and ministers and received foreign guests. Dunxu Hall, Hanyuan Hall, Yingtai, Ziguang Pavilion, etc. all became places where the emperor rested and conducted state activities.

Taiye Lake is today's North Sea, Zhonghai and South China Sea. The South China Sea was dug in the Ming Dynasty.

Today Beihai has been separated, Zhongnanhai is the seat of the State Council, and Xinhua Gate is Baoyue Tower in Nanhai.

Beihai, Zhonghai and Nanhai are located on the west side of the Forbidden City and Jingshan in Beijing, collectively known as the Three Seas.

During the Ming and Qing Dynasties, it was called Xiyuan.

It is one of the existing palaces in China with a long history, large scale and exquisite decoration.

The history of Sanhai can be traced back to the Liao Dynasty in the 10th century, when it was called Yaoyu.

It is a recreational place in the northern suburbs of Nanjing City in Liaoning.

In the nineteenth year of Dading of the Jin Dynasty (1179), a lot of construction work was carried out in what is now Beihai, and many exquisite palaces and gardens were built. They were first named Daning Palace and later renamed Wanning Palace.

According to the Records of the History and Geography of the Jin Dynasty: "There is Daning Palace in the north palace of the capital... In the second year of Mingchang, it was changed to Wanning Palace. There is Hengcui Palace in Qionglin Garden. There is Yaoguang Terrace in the west garden of Ningde Palace, and there is

Qionghua Island also has Yaoguang Tower. "It can be seen that the scale of the building is quite large.

The layout of the gardens at that time was generally centered on Qionghua Island, with palaces and gardens built around the island and Haizi.

Its location is equivalent to today's Beihai and Tuancheng parts.

According to documentary records, there was a shortage of Taihu stones when operating Qionghua Island in the Jin Dynasty, so Taihu stones from Genyue were removed from Bianjing (Kaifeng) to build Qionghua Island.

In the Yuan Dynasty, a large capital city was built with Haizi and Qionghua Island in the Jin Dynasty as the center, so this became a forbidden garden in the imperial city, called "Shangyuan".

After years of management, in the eighth year of Zhizheng (1348), the mountain was named Wanshou Mountain (also known as Longevity Mountain) and the water was named Taiye Pool.

There are many documented records of Wanshou Mountain and Taiye Pool in the Yuan Dynasty.

Tao Zongyi of the Yuan Dynasty said in "Zhuigeng Lu": "Wansui Mountain is located in the northwest of Da Nei, in the sun of Taiye Lake. It was named Qionghua Island in Jin Dynasty, and it was repaired in the third year of Zhongtong. The mountains are all built with exquisite stones. The peaks and mountains are hidden, and the pines are reflected.

The cypress trees are lush and beautiful... There are seven rooms of Guanghan Hall on the mountain, and three rooms of Renzhi Hall in front of the mountain.

, the hall is located on the round corner of Taiye Pool, with eleven couplets, facing the Longevity Mountain. "To the south of Yitian Hall (today's Tuancheng, Beihai), there is a small island in the water south of Taiye Pool, named Chitiantai.

The location of the entire Taiye Pool is roughly equivalent to the current range of the North Sea and the Central Sea.

In the Ming Dynasty, expansion was carried out on the basis of the Forbidden Garden in the Yuan Dynasty, establishing the current scale of Sanhai.

In the early Ming Dynasty, only some repairs were made to Guanghan Hall, Qingshu Hall and some buildings on Qionghua Island.

During the Tianshun period, Xiyuan was expanded on a large scale.

The main projects include: opening up the South China Sea, expanding the scope of Taiye Lake, and completing the layout of the North Sea, Zhonghai, and South China Sea.

The water surface between Yitian Hall and the Forbidden City was filled in, and Tuancheng was built.

Many new buildings were added on Qionghua Island and along the Taiye Lake.

During the Qing Dynasty, many new buildings and reconstructions were made to Xiyuan.

There were two important constructions: in the eighth year of Shunzhi (1651), the main building Guanghan Hall on the top of Qionghua Island and the surrounding pavilions were demolished, a giant Lama Pagoda and a Buddhist temple were built, and Long live Mountain was renamed Baita Mountain.

During the Qianlong period, in addition to the reconstruction of most of the buildings on Qionghua Island (Baita Mountain) in Beihai, many buildings were built on the northeastern and northern shores of Beihai.

During the Ming Dynasty, palaces, pavilions and courtyard valleys were built in the Nantai of Nanhai (now Yingtai) and the east coast of Zhonghai, which were relatively rich in natural scenery.

The current layout and garden architecture of the entire Sanhai were mainly completed during the Qianlong period.

Although it was repaired many times later, there were only some additions and deletions in some places.

The size of the Three Seas. Since the opening of the South China Sea in the Ming Dynasty, it has formed a pocket-shaped body of water that runs from the north to the south of the imperial city.

The two stone bridges on the Ether Liquid Pond are divided into three water surfaces: the North Sea is to the north of the Jinaoyu Hong Bridge, the South China Sea is to the south of the Centipede Bridge, and the Zhonghai is between the two bridges.

Emperor Qianlong of the Qing Dynasty said in his poem "Manti of Yuexin Palace": "Liuchi is just a lake, and the Ming Dynasty is divided into three seas." For hundreds of years, the names Sanhai and Xiyuan have been used together;

The Zhonghai and South China Sea are closely dependent on each other and are often collectively referred to as Zhongnanhai.

The overall layout of Sanhai inherits the tradition of ancient Chinese gardening art: islands are arranged in the water, connected to the shore with bridges and embankments, and buildings and scenic spots are arranged on the islands and along the coast.

The park covers an area of ??more than 2,500 acres (1 mu is 666.66 meters2), more than half of which is water, and the landscape is relatively open.

Qiongdao stands in the north, Yingtai faces each other in the south, and the long bridge lies on the waves, shaped like a hanging rainbow.

The rocks and various buildings on the island are intertwined to form a whole.

Many scenic spots are scattered high and low, dotted with density and density.

The main scenery of Beihai is centered on Baita Mountain.

Qiongdao is decorated with buildings such as the White Pagoda, Yong'an Temple, Qingxiao Tower, Yilan Hall, Yuegu Tower, and many rockeries, caves, corridors, winding paths, etc., including "One of the Eight Scenic Spots of Yanjing" inscribed by Emperor Qianlong of the Qing Dynasty.

The Qiongdao Chunyin "stele" and the bronze statue of Immortal Chenglu imitating the Jianzhang Palace of the Han Dynasty.