Photo taken on Sept. 2 shows the Ningdong Energy-chemical Industry Base in Yinchuan, Ningxia Hui Autonomous Region. With a planned area of 3,484 square kilometers, the base has a coal reserve of 38.6 billion tons, accounting for 84 percent of the total amount across Ningxia. Three pillar industries – namely, coal, electricity and coal-chemical – have taken shape at the base since 2003. [Photo by Mi Xingang/China.org.cn]