What's the name of begonia fruit?

Begonia fruit, the fruit of begonia tree, was originally called red thick shell, also known as Begonia fruit, Hutong, Yalap and so on. Latin scientific name: Calophyllum inophyllum L. Parietales, a tree of Rosaceae, with thick bark, grayish brown or dark brown, longitudinal cracks, and transparent resin often oozing from wounds; The skin is bright red, the flesh is yellow and white, the fruit is fragrant, and the fresh food is sour and crisp. Huailai, Hebei Province, China is rich in it, and it is also planted in other areas in the north, as well as in Hainan, Taiwan Province Province and Yunnan Province. Fruit oil can be used in industry, eaten after processing and refining, and can also be used as medicine; Begonia trees are solid and thick, resistant to wear and tear, resistant to seawater immersion, and not eaten by insects. They are suitable for shipbuilding, bridges, sleepers, farm tools and furniture. Bark contains tannin 15%, which can be used to extract tannin extract.