Is there a sea in Beijing? It depends on what kind of sea it is. Beijing has no sea in geographical concept, but Beijing has "sea".

The sea in Beijing should be a "Lake", which can be traced back to the Song Dynasty. There are lots of lakes and rivers in Mongolia. The Mongols called the lake "the sea". After they established their capital in Beijing, they also called several lakes in Beijing "sea".

In addition to these common lakes named after the sea, there are also many parks named after the sea in Beijing. Most of them have pleasant scenery, and there is a "sea" waiting for them.

It's not just in Beijing that lakes are called seas. For example, Yunnan, Sichuan, Inner Mongolia and Xinjiang also have such names.

Another reason is that the royal family pursued the pattern of having sea and mountains when building gardens, and compared lakes to seas. There are many lakes, rivers and even pools in Beijing known as the "sea". The reason why this area of water is called the sea is closely related to the influence of ancient Chinese myths and legends on the royal family.