There is a small red fruit on the tree in summer on the mountain, which is sweet. What's it called?

(scientific name: zheshu (Carr. )Bur。 Ex la Valle), a deciduous shrub or small tree, with a height of15m, light gray bark and irregular flaking; Young branches have fine hairs, then fall off, with hard thorns, 5-30 mm long, and old branches have no thorns. It grows on slopes, roadsides, houses or bushes below 1000 meters above sea level. The weather is clear, and it is effective for tuberculosis, scald and traumatic injury. People use it to treat cancer.

The polysaccharide of Cudrania tricuspidata root is mainly composed of glucose, arabinose, galactose and xylose. This has a miraculous effect on lung cancer.