**5. Some solutions for the conservation and sustainable development of medicinal plants and indigenous knowledge capital of the Tay ethnic group in Thai Nguyen province**

The preservation of medicinal plants in ethnic communities is closely related to the knowledge of ethnic minorities to use, if the knowledge element is lost, medicinal plants will become wild and ineffective plants. This knowledge exists and is passed on from generation to generation, mostly by word of mouth in each family, clan, and ethnic minority community. Therefore, the conservation of medicinal plants needs to be associated with the preservation of indigenous knowledge of the Tay ethnic group in Thai Nguyen province, there should be a management mechanism and conservation methods suitable to its characteristics of local.
