Shaguo, whose real name is Malus asiatica Nakai, also known as Begonia (Hebei), Wenlin Langguo (Compendium of Materia Medica) and Ling Lin (Tree Map of Hebei), is a small deciduous tree of Malus in Rosaceae, with oval or ovoid leaves, sharp tips and extremely fine serrations at the edges. 1 Flowering at the turn of spring and summer, with umbrella arrangement at the top of branches. Pedicels and calyx are hairy, and buds are red, but the color becomes pale after opening. The fruit is mature in autumn, oblate, 4-5 cm in diameter, yellow or red. It is widely distributed in the Yellow River and Yangtze River basins in Chinese mainland and Liaoning Province, and grows at an altitude of 50 meters to 65,438+0,300 meters. It usually grows on the original hillside, flat land and valley terraces. Tastes like apples, and there are many varieties. It can be propagated by grafting, sowing, branching and other methods. This is a unique plant in China. Sweet and sour.