故宫内的殿宇楼阁均为砖木结构，很容易着火。一旦发生火灾，如果不能及时扑救，火势就会迅速蔓延，把这座价值连城的辉煌建筑顷刻之间化为乌有。为此，紫禁城的建设者们对防火特别重视，在宫殿前设置了这些大缸，称之为“门海”。门海即门前的“大海”，门前有了“大海”，以水克火，砖木结构的故宫就不怕火灾了。因此，这些铜缸又被称作吉祥缸。每尊缸可贮水3000多升，如同一座座小水库。

All the buildings in the Forbidden City are made of brick and wood, which is easy to catch fire. Once there is a fire, if it can't be put out in time, the fire will spread quickly, and the priceless brilliant building will be wiped out in an instant. For this reason, the builders of the Forbidden City pay special attention to fire prevention, and set up these large tanks in front of the palace, which are called "Menhai". The gate sea is the "sea" in front of the gate. If there is a "sea" in front of the gate, water can overcome fire. The palace museum with brick and wood structure is not afraid of fire. Therefore, these copper jars are also called auspicious jars. Each tank can store more than 3000 liters of water, just like a small reservoir.

唐县汇丰雕塑铸造厂家集科研、开发设计、普通铸造、一次性整体浇铸、精密铸造于一体。凭着良好的信用，优质的服务与多家企业建立了长期的合作关系，主要生产的铜缸系列产品包括故宫铜缸、铜大缸、寺庙铜大缸、铸铜大缸、黄铜大缸、青铜缸等，1.2米庭院铜大缸加工，类型多样，精雕细琢，精心设计铸造而成，深受各界用户的欢迎和好评。

Tang County HSBC sculpture foundry set scientific research, development and design, common casting, one-time overall casting, precision casting in one. With good credit and high-quality service, we have established long-term cooperative relations with many enterprises. The main products of the copper cylinder series include the Imperial Palace copper cylinder, the copper cylinder, the temple copper cylinder, the cast copper cylinder, the brass cylinder, the bronze cylinder and so on. The 1.2-meter courtyard copper cylinder is processed by various types, elaborately designed and cast, which is welcomed and praised by users from all walks of life.