玄武灯组（Black Tortoise Lamp Group）

Black Tortoise, one of the four spirits of heaven in ancient Chinese mythology, also known as turtle and snake, originates from ancient star worship, refers to the 28 nights according to the east, south, west and west is divided into four images of the northern Black Tortoise seven nights. In traditional Chinese culture, the four elephants refer to Azure Dragon, Bai Hu, Vermilion Bird and Black Tortoise, representing the east, west, north and south, respectively. Black Tortoise in the north is the ridge in the eight diagrams and the main water in the five elements, symbolizing the old yin in the four images, the winter in the four seasons, and the north land of heaven at the same time.