铜缸 有祈福祛灾的吉祥作用，又称“门海”、“福海”、“吉祥缸”。同时，大 缸也是一个循环的“小五行”：金生水、水克火！紫禁城中最豪华的鎏 金铜缸摆置在象征皇权的太和殿东西两侧，据说每次鎏这种规格的大铜 缸要用去3公斤黄金。

Copper cylinder has the auspicious function of praying for good fortune and dispelling disaster, also known as "Menhai", "Fuhai", "auspicious cylinder". At the same time, the cylinder is also a cycle of "small five elements": Jinshengshui, Shuike fire! The most luxurious bronze VATS in the Forbidden City are located on both sides of the Taihe Temple, which symbolizes the imperial power. It is said that every time a large copper vat of this size is used up to 3 kilograms of gold.