Ding is used for cooking during sacrifices, recommending sacrifices, cooking during feasts, and serving meat. This square tripod is located in a pit about 300 meters outside the north section of the west city wall of Zhengzhou Mall. It is thick in shape and mysterious and solemn in decoration. Fang Ding adopts a separate casting method, first casting the ears of the tripod, casting the ears together when casting the belly, and finally casting the legs and belly of the tripod. In order to make it firm, the perimeter where the foot and the bottom of the abdomen are combined is also thickened, so that the foot and the bottom are tightly combined. There are two square tripods of the same shape unearthed from the pit, of which the padding part of the larger one was dug down to keep the mouths of the two square triplets flush. This deliberate practice made the cellar pit in Zhangzhai South Street have a strong ritual element, and scholars speculated that it was related to sacrificial activities such as "suburban" and "fu" at that time.