In 1703, the Kangxi Emperor designated Chengde as the Qing dynasty's summer residence, beginning a construction project that would transform a mountain valley into a functioning seat of imperial government. Throughout the eighteenth century, the Mountain Resort grew into a vast complex of palaces, temples, and gardens covering 5.6 square kilometers. Because the emperor brought his government with him when he traveled, Chengde became a political center during the summer months, where high-level diplomatic meetings were held, foreign envoys were received, and the business of ruling a multiethnic empire continued amid cooler mountain air. The Putuo Zongcheng Temple, loosely modeled after the Potala Palace in Lhasa, was completed in 1771 after just four years of work, its interiors heavily decorated with gold and housing a bronze-gilt statue of Tsongkhapa, the founder of the Gelugpa school of Tibetan Buddhism.

Chengde's political fortunes have swung dramatically across the past century. Under the early Republic of China, it served as the capital of Rehe Province. From 1933 to 1945, the city was under Japanese occupation as part of the puppet state of Manchukuo. After Japan's defeat, the Kuomintang government regained jurisdiction, only to lose it again when the People's Liberation Army took control in 1948. Chengde remained part of Rehe Province until 1955, when the province was abolished and the city was incorporated into Hebei. Each transition left its mark on the city's identity -- from imperial retreat to provincial capital to occupied territory to communist administrative center -- a series of political transformations compressed into a single human lifetime.

Chengde holds an unusual linguistic distinction: its local dialect is considered the closest living approximation of Standard Chinese, or Putonghua. When the People's Republic established a national standard language, it drew significantly from the speech patterns of the Chengde region. The reasons are partly historical -- Chengde's centuries as an imperial retreat meant its language was influenced by the court speech of Beijing while remaining more conservative than the rapidly evolving dialects of the capital itself. For linguists, Chengde represents a kind of living archive of the sounds that shaped modern Mandarin. The city sits in the northeastern portion of Hebei, bordering Inner Mongolia, Liaoning, Beijing, and Tianjin, a geographic crossroads that contributed to the clarity and relative neutrality of its speech.

Chengde's landscape is overwhelmingly mountainous. The prefecture stretches 269 kilometers from north to south and 280 kilometers from east to west, covering nearly 40,000 square kilometers -- over a fifth of Hebei's total area -- yet its population density remains low because so much of the terrain is steep and wooded. The Mountain Resort and the Eight Outer Temples form the core of the city's World Heritage complex, designated by UNESCO in 1994. Among the Outer Temples, the Puning Temple houses the world's tallest wooden statue of the Bodhisattva Avalokitesvara, standing 22.28 meters high. Outside the historical core, the Jinshanling section of the Great Wall winds through the mountains of Luanping County to the south. And then there is Sledgehammer Peak -- a large natural rock formation shaped like an inverted sledgehammer, which has become one of the area's most recognizable landmarks, proof that geology has its own sense of humor.