From "trading chicken feathers for candy" to a global trade hub, how did Yiwu build a world supermarket with 2.1 million products? This course explores its internationalization and digital transformation, dissecting innovations like the China-Europe freight train and the Chinagoods platform, while decoding how livestreaming e-commerce and AI design empower traditional trade. Blending trade history, technological evolution, and cross-cultural exchange, it presents Yiwu as a Belt and Road pivot city, where small commodities link global markets and reshape supply chains.