Sago, proper name Flowering Red, also known as Begonia Fruit (Hebei), Wenlinlang Fruit (Materia Medica), and Ringo (Hebei Xiomi Tree Illustration), is a plant of the genus Apple in the family Rosaceae, a small deciduous tree, with ovate or elliptic leaves, cuspidate at the tip, and very serrulate margins. [1]? Flowers bloom in spring and summer, umbellately arranged at the top of the branches, the pedicels and calyxes are velvety, the buds are red at the time of opening, the color fades to a reddish tinge. Fruits ripen in autumn, oblate, 4-5 cm in diameter, yellow or red. Commonly distributed in mainland China along the Yellow River, Yangtze River Basin and Liaoning, growing in areas from 50 m to 1,300 m above sea level, often growing on raw mountain slopes, flatlands and valley terraces, tastes like apples in raw form, and there are many varieties, which can be reproduced by grafting, sowing, and dividing, etc., and it is an endemic plant in China. Sweet and sour.