Relationship between geopolitical political structure and distribution of Dao-di herbs in frontier provinces of China Status and future of natural resource for Chinese materia medica Relationship of epigenetic and Dao-di herbs Experimental verification and prospect on stress effect of Dao-di herbs Scutellaria baicalensis Study of genuineness based on changes of ancient herbal origin——taking Astragalus membranaceus and Salvia miltiorrhiza as examples Dao-di herbs and its change of cultivated origin place Detection of agent "zhuanggenling" and investigation of utilization of plant growth retardants in traditional Chinese medicine cultivation Review on study of Dao-di herbs Artemisiae Annuae Herba