Xinjiang umeboshi, is the immature fruit green plum or mature fruit yellow plum, smoked by smoke and become. If the green plum with salt water sunshine night dip, 10 days after the formation of white frost, called white frost plum, its efficacy is similar, the same contraindications. According to modern research. Plum or plum juice containing more potassium and less sodium, therefore, the need for long-term use of potassium diuretics should be eaten; plum China contains catechuic acid can promote intestinal peristalsis, so the constipation of the people should be eaten. Plum contains a variety of organic acids, improve liver function, so patients with liver disease should eat. Plum in the plum acid can soften blood vessels, delay vascular sclerosis, with anti-aging effect.