lushanxianIntroduction：Introduction to Lushan: Lushan County (the county under the jurisdiction of Ya'an City, Sichuan Province) is located in the western margin of the Sichuan Basin and belongs to the basin-mountainous mountainous county. North and Wenchuan, northeast and Chongzhou, Datun, southeast and south, south and rainy city, southwest and Tianquan, northwest and Baoxing. It is 180 kilometers away from Chengdu. At 08:02 on April 20, 2013, a magnitude 7.0 earthquake occurred in Lushan County, Ya'an City, Sichuan Province (30.3 degrees north latitude, 103.0 degrees east longitude) with a focal depth of 13 kilometers. Caused heavy casualties and property damage.