The Mulan Weichang — the Great Enclosure of the Mulan hunting ground — was the Qing dynasty's imperial hunting reserve in the grasslands north of Chengde. The name comes from the Manchu word for a specific hunting technique in which riders drive game in a narrowing circle, and the reserve covered roughly 10,000 square kilometres of the present Bashang region. The Kangxi and Qianlong emperors made annual expeditions here as a way of maintaining Manchu martial identity and reinforcing political relationships with Inner Asian vassals.
The landscape today is not dramatically different from how it looked in the 18th century: open grassland and birch forest with occasional volcanic hills. Remnants of the imperial infrastructure — guard posts, way stations, stone bridges — can still be found in the more remote sections. The main historical visitor point is in Weichang County, where a small museum documents the hunting tradition and the political mechanics of the grand Mongolian audiences that accompanied them.