Book excerpt: 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. This process has moved from the alliances of the Dong world to the indirect rule of the Tusi (native official) age to the Qing and recent Gaitu Guiliu efforts at direct rule by the state, placing regular officials in charge there. The essays detail the complexities of this frontier through time, space, and personality, particularly in those instances, as today on land and sea, when China elects to pursue an aggressive policy in this direction. Contributors include: Brantly Womack, Kenneth MacLean, Amy Holmes-Tagchungdarpa, Bradley Davis, Jaymin Kim, Alexander Ong, Joseph Dennis, Sun Laichen, John K. Whitmore, Kathlene Baldanza, Kenneth M. Swope, Michael Brose, James A. Anderson, Liam Kelley, and Catherine Churchman.