明清时期,紫禁城西侧的南海、中海、北海合称“三海”。当时统称西苑、西海子,也叫太液池。三海作为皇家禁苑,始拓于金、元,是金代离宫万宁宫的所在地,元代营建大都时,划入大内范围。明代嘉靖、万历年间的大规模土木工程,奠定了中南海的基本格局。清代又进行多次增扩改建,其建筑格局一直保留下来。应该说,在中南海的历史进 During the Ming and Qing Dynasties, the South China Sea, the China Sea and the North Sea on the west side of the Forbidden City were collectively called “Three Seas ”. At that time collectively Xiyuan, West Hai Zi, also called too liquid. As the Royal Forbidden Garden, San Hai began to develop in Jin and Yuan Dynasties. It is the site of the Wannong Palace of Jin Dynasty. In the Yuan Dynasty, most of the buildings were built in the territory of Grand China and Inner Mongolia. Large-scale civil engineering in Jiajing and Wanli of Ming Dynasty laid the basic pattern of Zhongnanhai. In the Qing Dynasty, it was expanded and rebuilt several times and its architectural pattern has been preserved. It should be said that the history of Zhongnanhai into