Concrete Connections: Green Island Cement and the Politics of Trade in China and British Hong Kong

Green Island Cement (GIC) was the first cement factory serving the China market, founded in Macao in 1886 and followed by a branch in Hong Kong the next year. Operating as a Hong Kong–based firm, GIC had become by the early twentieth century a major supplier of Portland cement—an essential component of reinforced concrete—to markets in Hong Kong and Shanghai. This paper traces GIC’s early development to demonstrate how cement, though produced by private enterprises, emerged as a key infrastructural material that attracted sustained governmental scrutiny over its supply, pricing, and trade. Impressed by GIC’s operations, Qing official Li Hongzhang promoted domestic cement production as part of China’s modernization agenda, introducing statebacked competitors that directly challenged GIC’s dominant position. In the 1930s, GIC became enmeshed in intensifying regional trade and political conflicts. The influx of lowcost Japanese cement forced the closure of GIC’s Macao plant, while Guangdong authorities restricted GIC imports to protest Hong Kong’s tariff regime, prompting the Hong Kong government to mandate GIC’s exclusive use in local public works. Ultimately, GIC’s history illuminates the complex intersection of private enterprise, trade politics, and state intervention that shaped the region’s early twentieth-century business landscape.