The bronze VAT can not only be used to hold water, but also has a certain emphasis on geomantic omen. For example, the way to carve large VATS on both sides of the courtyard gate not only appears generous and noble, but also has the meaning of water can gather wealth and expand the source of wealth. Thus, it can be seen that the bronze VAT occupied a very high position in ancient times.
In the Palace Museum, there are large bronze cylinders in front of the palace hall and in the courtyard. These large bronze vats are cast copper sculptures in the sculpture process. They have a wide belly and a large mouth, and are decorated with exquisite decoration. The two ears are decorated with bronze rings with animal faces. It is said that these large copper cylinder sculptures were originally used for fire prevention. Because the main building material in the Palace Museum is mainly made of wood, it is easy to cause fire The large bronze jar at the door is filled with water in case of emergency. However, the actual significance of these bronze cylinders is not only limited to fire fighting, but also the exhibits of the palace hall. These auspicious large bronze cylinder sculptures are mostly made of high-quality bronze. The gilded bronze cylinder ranks the highest and shows the most luxury and nobility. Some back palaces and long streets are decorated with small copper or iron vats.