
Section 1 — Beyond the Great Wall: When the People From the Northern Frontier Became the Rulers At Yanmenguan (雁门关), Elaine and I stood on China’s northern frontier and asked why Chinese states and dynasties kept building walls. Then, farther north near Datong (大同), we visited Yungang Grottoes (云冈石窟) — and encountered the other half of the story. What happened when peoples from beyond the old Central Plains political world didn’t merely...









