Textual research of materia medica on Chinese-Tibetan medicine -Terminalia chebula, Terminalia billerica, Phyllanthus emblica Resources and application of She’s nationality wild medicinal plants Ecosystem service value of restored secondary forest in the Karstic-rocky hills —A case study of Nongla National Medicine Nature Reserve,Guangxi Zhuang Autonomous Region Pharmacognostic studies on root of Fordia cauliflora