The Zhuoying Spring is a culturally significant artesian

Artesian aquifer

An artesian aquifer is a confined aquifer containing groundwater under positive pressure. This causes the water level in a well to rise to a point where hydrostatic equilibrium has been reached. This type of well is called an artesian well...

 karst
spring located in historical center of the city of Jinan

Jinan

Jinan is the capital of Shandong province in Eastern China. The area of present-day Jinan has played an important role in the history of the region from the earliest beginnings of civilisation and has evolved into a major national administrative, economic, and transportation hub...

, Shandong

Shandong

' is a Province located on the eastern coast of the People's Republic of China. Shandong has played a major role in Chinese history from the beginning of Chinese civilization along the lower reaches of the Yellow River and served as a pivotal cultural and religious site for Taoism, Chinese...

 Province, China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. It is listed among the 72 famous springs
of Jinan (as number 19.). The spring forms a large spring pool, the Palace Pool , that is used as a public outdoor swimming pool.

The name "Zhuoying Spring" comes from a poem from Mencius

Mencius

Mencius was a Chinese philosopher who was arguably the most famous Confucian after Confucius himself.-Life:Mencius, also known by his birth name Meng Ke or Ko, was born in the State of Zou, now forming the territory of the county-level city of Zoucheng , Shandong province, only thirty kilometres ...

, "Li Lou
Shang" , that contains the phrase "wash out the tassel" .

When the army of the Jin Dynasty invaded Jinan moving southward
into the territory of the Southern Song Dynasty, the local garrison commander, Guan Sheng , refused to surrender. A bloody battle ensued and the soldiers washed the textile decorations of their
lancets in the Palace Pool.

The name "Palace Pool" dates back to the time of the Ming Dynasty

Ming Dynasty

The Ming Dynasty, also Empire of the Great Ming, was the ruling dynasty of China from 1368 to 1644, following the collapse of the Mongol-led Yuan Dynasty. The Ming, "one of the greatest eras of orderly government and social stability in human history", was the last dynasty in China ruled by ethnic...

,
when the De Wang Palace was constructed at the site and the spring
pool was included into its grounds. Today, the pool lies in a historical residential neighborhood with private residences on the water edge.