Forest ecosystem is a base for exist and development of Sunan mountainous region of Gansu at the upper Heihe River in arid northwest China.

In this article,the stochastic point-source model is adopted to simulate the minor-moderate magnitude Sunan earthquake (ML=4.

Study on the Part Problem of Carrying out Curriculum Criteria of Health and Physical Education in Junior Middle School in LONGNAN of GANSU;

Tectonic Deformation and Evolution Trend of Beishan Region, Gansu Province since Late Quaternary;