Yanchi county,Ningxia Hui Autonomous Region located in the ecotone of agriculture-animal husbandry of China is one of the representative belt in the north of China.

• 盐池县位于我国北方的农牧交错带,是我国北方的一个典型的过渡地带,独特的地理位置也使该地区成为我国荒漠化的主要发生区。