Litchi, together with bananas, pineapples and longan, is called "the four major fruits in South China". Litchi, native to southern China, is a subtropical fruit tree and an evergreen tree, with a height of about10m. The pericarp is mostly scaly, bright red and purple. When the pulp is fresh, it is translucent, fat-like and delicious. But it is not resistant to storage. Yang Guifei is famous for her love of litchi, which made Du Mu write a famous sentence "The world of mortals rides a concubine and laughs, but no one knows it is litchi". In addition, scholars of past dynasties also wrote many poems about litchi. Litchi is hot, and it is easy to get angry if you eat too much, which will cause "litchi disease". Litchi fruit can not only be eaten, but also be used as astringent analgesic to treat heart gas pain and intestinal gas pain. Solid wood, dark reddish brown, elegant texture, corrosion resistance, has always been a first-class material. It is an important nectar source plant with many flowers and rich nectaries.