This is Albizia Albizia tree, which was called "hūn" nocturnal tree in ancient times, Ma Yinghua, velvet tree, shoulder pole tree and hibiscus tree. Beautiful flowers, shaped like fluff balls, are fragrant; Ye Qi, closed at sunset and open at sunrise, gives people a symbol of friendship. Flowers and leaves are strange, and the shade is like an umbrella. They are planted in front of the hall for viewing. It is excellent to be a shade tree, a street tree, or planted by a garden pool. Albizia Albizia leaves are slender as feathers, shaded as umbrellas and clustered with red flowers. They are beautiful and unique, and have strong resistance to hydrogen chloride and nitrogen dioxide, and have certain resistance to sulfur dioxide and chlorine. Bark and flowers can be used as medicine, which has the effects of calming the nerves, relieving depression, promoting blood circulation and relieving pain, stimulating appetite and benefiting qi. The extract can be used externally to treat fracture, painful gangrene, swelling and pain. Wood is solid, straight in texture, fine in structure and durable, and can be used to make furniture, farm tools, architecture and shipbuilding. Albizia Albizia is a sensitive plant because of the difference between yin and yang, and it is listed as the first choice for earthquake observation.