Why did the stone lion keep his mouth shut?

There are rules for the placement of the stone lions. Generally speaking, it is a male and a female, with one mouth open and one mouth closed, in pairs. The stone lions on both sides of the gate are placed according to the direction of people coming out of the gate, and they are generally left men and right women, which is in line with China's traditional philosophy of Yin and Yang. The lion placed on the left side of the door is generally carved into the right front paw to play with hydrangea or there is a hydrangea between the two front paws; The lioness on the right side of the door is carved into the left front paw to touch the cub or the cub is located between the two front paws. The above situation is universal, but there are some exceptions. For example, the stone lions in front of Guandi Temple in Jiayuguan, the stone lions in front of Confucius House in Qufu, and the stone lions on the north and south sides of Donghuamen Street in Gulou. These lions are very special in shape. There are no hydrangeas and cubs under the claws, so it is difficult to distinguish between males and females. In addition, the two pairs of stone lions on the front and back sides of Sanmen Square, the four pillars of Mount Tai where Confucius ascended the throne, are left females and right males, which is just the opposite of the usual situation and its meaning is unknown. Stone lions generally take Mount Sumi as the base, and there are brocade shops on the base (spread on Mount Sumi, with four corners hanging around Mount Sumi). Lions have different shapes. They are beautified in China. Their basic form is full of curly hair, magnificent. In front of the office, one opens his mouth and the other closes his mouth, which means swallowing mountains and rivers, spitting and sucking, and having style. In the merchant's bank, it means you can make a fortune if you go out and enter! Open your mouth and go out, close your mouth and go in with the ball! There are also stone lions carved on the eaves of old houses, which are opened by officials and are not open for business. There are two kinds of stone lions carved, and both officials and businessmen are wealthy.