 Zhou also undertook to start and run a number of businesses throughout KMT- and Japanese- controlled China.Zhou's businesses grew to include several trading companies operating in several Chinese cities (primarily Chongqing and Hong Kong), a silk and satin store in Chongqing, an oil refinery, and factories for producing industrial materials, cloths, Western medicines, and other commodities.Under Zhou, Communist businessmen made great profits in currency trading and commodity speculation, especially in American dollars and gold.