Trend 2004 - 2012. China Data Center, University of Michigan. China Yearly Statistics (National/Provincial/City/County): International Tourism | Country: China | All Provinces: Gansu | Cities: Wuwei City | GroupCode: 2108.b0101 | Labor Metric*: International Tourism Foreign Exchange Earnings - Current period value, 2004-2012. Data-Planet™ Statistical Ready Reference by Conquest Systems, Inc. Dataset-ID: 035-002-017.