China-Places.com listou aprox 53 empresas dentro Yiyang. Alguns dos mais bem avaliados empresas dentro Yiyang estão- Departamento de atacado de Zhengshi Group Xielingang Zhibao, Hunan Yiyang Tea Factory Limited Company, Hunan Jinhe Property Company Limited, Yiyang Chemical Industry Wholesale Company, Yiyang Agriculture Machinery Limited Company, Hunan Power Company Yiyang Heshan Electric Power Supply Bureau, CPC Hualin Industry Devlopment Company Limited Zhiweihui, Yiyang Agriculture Machinery Limited Company, Hunan Aihua Group Company Limited & Yiyang City Duoneng Electric Co. Ltd..