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Polygonatum is a traditional and precious Chinese medicine in China, as well as a tradition at medicinal and food homologous material. It has a long history of cultivation and medicinal use. It not only has the effects of boosting qi and nourishing yin, nourishing the spleen and lungs, and tonifying the kidney, but also application value in food, health products, ornamental, cosmetics, etc. There are many varieties of Polygonatum resources all over China, which arc easy to be mixed. There are three species of medicinal Polygonatum recorded in the 2015 edition of Pharmacopeia of the People) Republic of China. In order to Sustainably use and fully develop Polygonatum medicinal resources, we conducted textual research on relevant data and research on the destitution of Polygonatum resources, germplasm metrification, genetic diversity and breeding research, so ad provide a reference for the selection and breeding of polygonatum, artificial cultivation and the development and utilization of potential Polygonatum resources and for the solution of the contradictor between supply and demand in the Polygooatum market. [ABSTRACT FROM AUTHOR]

The article discusses about various issues related to the U.S. security policy on China. This discussion shows that, from China's perspective, the key to improving the U.S.-China relations is not stressing common interests in reality, but stressing China's long-term goodwill. The most important issue in the U.S.-China security relations is Taiwan issue. When dealing with Taiwan issue, China should also take into account how to influence the U.S. concerns about gains. The U.S., therefore, might adopt a more co-operative policy on China.