Xuanwu is a prominent figure in Chinese mythology and Taoism, often depicted as a black tortoise entwined with a snake. He is one of the Four Symbols, which represent the four cardinal directions and are associated with various elements and seasons. Xuanwu is specifically linked to the north and is considered a guardian of the underworld. In addition to his mythological significance, Xuanwu is also associated with martial arts and is revered in various temples across China. His image symbolizes protection and strength, making him a popular figure in both religious and cultural contexts.