Introduction to the animal heads: This pair of evil spirits look up and up, with majestic postures. Its huge mouth opened, revealing two prominent teeth, and a long tongue protruding from the mouth hung down to its chest. The two ends of the upper lip are ridged, the nose is round and protruding in the middle, the nostrils are stretched, and the eyes are wide open, looking powerful and energetic. The neck below is short and thick, and there are round grooves from the top of the head to the back and chest.