Research progress on Typhonii Rhizoma Effect of climate change on genuine medicinal materials producing areas during last 2 000 years—Alisma orientale and Citrus aurtantium as examples Relationship between geopolitical political structure and distribution of Dao-di herbs in frontier provinces of China Textual research on planting history of Rehmannia glutinosa and its cultivated varieties Discussion on herbal textual research on of Flos Lonicerae