The mold with mud seal on the rice wine jar is called "jar mouth mold" According to the relevant public information, the clay sealing mold on the yellow wine jar is a kind of clay mold used to seal the mouth of the yellow wine jar, which is usually made of clay material. The shape and size of the jar mouth mold correspond to the jar mouth, which can effectively seal the jar mouth, prevent air and dust from polluting the yellow rice wine, and also prevent the gas in the yellow rice wine from leaking out.