I. Personal Profile Chang Chaoyang, male, Han nationality. Born in June, 1964, from Quwo, Shanxi. Doctor, professor, doctoral supervisor. Second, the research field is mainly engaged in the research and teaching of plant taxonomy, phylogenetic botany and floristic geography, as well as the research on biodiversity and the development and utilization of plant resources. Three. Resume: 1986 graduated from Shanxi university, majoring in botany, 1990 received a master's degree from Northwest University, and received a doctorate from Northeast Forestry University in 2008. At present, he is a professor and master tutor in the School of Life Sciences of Northwest A&F University. 4. Scientific research achievements (1) Scientific research projects 1. National Natural Science Foundation Project: Comparative Morphology and Systematic Classification of winged bean, an endemic plant in China, 1992- 1994, participated in. 2. National Natural Science Foundation Project: Study on Phylogenetic Relationship of Caragana, 1994- 1996 participated. 3. Shaanxi Natural Science Foundation Project: Research on the database information system of Qinling Seed Plants, with the participation of 1993- 1995. 4. Shaanxi Natural Science Foundation Project: Study on the Phylogenetic Relationship of Qi Jingu, 1997- 1998, mainly participated in. 5. Sino-Japanese cooperative research project: comprehensive research on sustainable agriculture in the Loess Plateau? Study on Tree Selection and Endurance Adapting to Loess Plateau, 1995-2000, mainly involved. 6. National Natural Science Foundation Project: Cytogeographical Study of Leguminosae Subspecies from Two Sides of Meng Xin, 1996- 1998, mainly involved. 7. Youth Fund Project of Shaanxi Academy of Sciences: Research on Development and Utilization of Dominant Leguminous Plant Resources in Northwest China, 1998-2000, presided over. 8. China Academy of Sciences Biological Specimen Museum Network Engineering Project, 2000-2005, mainly participated in. 9. National Natural Science Foundation Project: Revision of Classification and Floristic Geography of Astragalus in China, 2003-2005, presided over. 10. National Natural Science Foundation Project: Floristic Geography of Vascular Plants in Daba Mountain and Its Plant Resources (narrow sense), 2004-2006, participation. 1 1. Supported by Flora of China, an international cooperation project of the National Natural Science Foundation: systematic revision of Astragalus in China, 2005-2008, presided over. 12. National Natural Science Foundation: Taxonomic Revision and Floristic Geography of Astragalus in Qinghai-Tibet Plateau, 2009-20 1 1, presided over.