Red bean, also known as peacock bean, is a deciduous tree of the genus Red bean in Mimosaceae. The plant height can reach 30 meters, the DBH can reach 60 cm, the crown is broad, and the shading effect is good. The perianth is golden yellow with scattered inflorescences, which looks like proud as a peacock. The seeds are bright red, glittering and translucent, and can be used as ornaments and gifts. Since Wang Wei wrote the famous sentence "when those red berries come in springtime, flushing on your southland branches, take home an armful, for my sake, as a symbol of our love", red beans have become the seeds of acacia. Jia Baoyu, the lover of Cao Xueqin's works, wrote a "red bean word" which contains her daughter's sadness, sorrow, joy and joy. Whenever the fruit is ripe and planted, little red beans are dyed in the sand, which is really "affectionate and patient, always bent down to pick it up, and placed in front of Iraqis, missing a little bit." As a sentimental ornamental plant in the south of China, in the garden with flowers like cotton and green trees like cover, red beans 1 plant can be dotted, which can double the scene. There are many kinds of red beans, about 100, and there are nearly 40 species in China, mainly more than 30 species of Malus, Malus podophylla, Malus hainanensis and Acacia. Among them, the seed of acacia is very beautiful with a black spot in the red, but the plant is a small vine and has not been cultivated yet. In the landscaping, the most plants are sea beans, with the brightest red seeds and the longest color retention period, which are suitable for cultivation in roads, parks, waterfront, courtyards and other places.