Tongtie Vat

The copper iron cylinder is one of the representatives of the Forbidden City, which can be seen everywhere in the Forbidden City. In ancient China, the waterproof of the house is the first place, especially the national buildings such as the Forbidden City.

The capacity of the copper iron cylinder is very large, which is an important tool for suppressing fire. In winter, the Beijing air drying materials are dry and the water is condensed into ice. According to the practice in the palace, each large cylinder is equipped with charcoal fire, and the water is constantly distributed, which can both keep warm and prevent fire. The capacity of the copper iron cylinder is very large, which is an important tool for suppressing fire. In winter, the Beijing air drying materials are dry and the water is condensed into ice. According to the practice in the palace, each large cylinder is equipped with charcoal fire, and the water is constantly distributed, which can both keep warm and prevent fire.

故宫里面，铁质的大缸是明朝遗留下来的 ， 铜制的是清朝遗留下来的 ， 镏金大缸上还有八国联军时留下的刮痕，现在依然可见。

The copper iron cylinder is very large, all distributed next to the entrance of the palace, mainly to store water, used for the Forbidden City fire spare water, in winter will also be under the cylinder to prevent the water in the cylinder from freezing.

In the Forbidden City, there are a total of copper iron cylinders, more than 300 mouths, distributed in various corners, these iron cylinders have Ming Dynasty, Qing Dynasty, Ming Dynasty relatively simple, Qing Dynasty on both sides of the symmetrical beast head.