How a mundane metal bound miners and officials to global capitalism and an emerging technocratic stateTin was everywhere in early modern China—lining tea chests, shaping religious vessels, alloyed into coins. Yet beneath this ordinary metal lies a story of migration, technology, and governance that paved the way for China’s entry into global capitalism. The Tin Centuries uncovers how tin connected miners in Yunnan and Southeast Asia, entrepreneurs and traders across oceans, and Qing officials confronting unprecedented demands on natural resources. Yijun Wang traces how Chinese migrant miners established large-scale operations in mining frontiers like Gejiu, in the mountains of Southwest China, and on Bangka, an island off the coast of Sumatra, carrying with them not just techniques but what she calls a “social technology”: organizations of labor, capital, and fraternity culture that allowed them to dominate extraction in new environments. These enterprises fueled both European colonial expansion and the broader circuits of Asian commerce. At the same time, Qing bureaucrats turned mining administration into a crucible for technocratic statecraft. Influenced by the technocratic culture fostered by bannermen experts in the early Qing, bureaucrats at different administrative levels, especially those in Yunnan, codified technical knowledge, experimented with alloys, and integrated empirical expertise into governance. This incremental transformation culminated in Wu Qijun’s mid-nineteenth-century Illustrated Strategy of Mines and Smelters in Yunnan. Mining and the management of mineral resources became a proving ground for a new political culture in which practical skill stood alongside Confucian learning. By following tin’s movement from mountains and islands to imperial mintage and treasuries, The Tin Centuries reframes the history of technology, migration, and empire. It reveals how a seemingly humble metal reflected the changing trajectory of Qing statecraft and foreshadowed China’s path toward modernity within an expanding global economy.