China's Encounters on the South and Southwest. Reforging the Fiery Frontier Over Two Millennia discusses the mountainous territory between lowland China and Southeast Asia, what we term the Dong world, and varied encounters by China with this world's many elements. The essays describe such encounters over the past two millennia and note various asymmetric relations that have resulted therefrom. Local populations, indigenous chiefs, state officials, and rulers have all acted to shape this frontier, especially after the Mongol incursions of the thirteenth century drastically shifted it....