Bet365 app download Hou Yijian，Professor of the Northwest Historical Environment and Economic and Social Development Research Center of Shaanxi Normal University，Doctor of the Institute of Earth Environment of the Chinese Academy of Sciences。1994-1996 visited the Department of Literature, the University of Nagoya, Japan。2005-2019 as editor -in -chief of the journal "The theory of Chinese History and Land"。Published on the papers such as "Shenshan · Qishan · Heroes Mountain -West Yue Huashan's Historical and Cultural Consequences" and other papers，and "Historical Geography Exploration" (episode 1-3) and other works。Mainly engaged in historical geography、Research in the field of environmental history，Currently engaged in the writing of the history of the environment of the northwest and the environment of the Qinghai -Tibet Plateau。email: yjhou@snnu.edu.cn 

　　Summary of content:High slope steep on the south side of Liupan Mountain、Zhuanglang County covered with loess，Organize local people to build terraces，It has been more than half a century to this day，The degree of gradient of farmland in the county reached 91.74%(level at the end of 1997)，Create the production and living environment expected by the local people。The contemporary significance of the Xingxiu terraces in Zhuanglang County lies in actively improving the home environment，Carry out the practice activity of soil reform according to local conditions，Go out of the road to social development of the Yellow Turkish Mountains，It should be respected and understood by the outside world。