紫禁城是明清两代的皇宫。无论是在其“外朝”或是“内廷”的宫殿庭院及东、西六宫长街处 ,均设置着无数引人注目的“吉祥缸”(也称“太平缸”)。吉祥缸有铜缸和铁缸两种 ,其质可分“镀金海”铜缸、青铜缸和铁缸三类。皇宫各处陈设吉祥缸的大小、多少 ,是随环境而定的。如太和 The Forbidden City was the royal palace of the Ming and Qing dynasties. No matter whether it is in the “outer court” or “the inner court” palace courtyard and the east and west six palaces long streets, there are numerous eye-catching “auspicious cylinders” (also known as “taiping cylinder”). The auspicious cylinder has two kinds of copper cylinders and iron cylinders. Its quality can be divided into three categories: “gold-plated sea” copper cylinders, bronze cylinders and iron cylinders. The size and size of the auspicious jars installed throughout the palace depend on the environment. If Taihe