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Yinchuan
Chinaroma - Yinchuan
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Travel China Guide: Ningxia
http://www.travelchinaguide.com/cityguides/ningxia/index.htm
Basic facts and information on Yinchuan.
Zhengyang Products Co. Ltd.
http://www.zhengyang.biz/
Diversified science, industry and trade corporation. Information on each of its subsidiaries.