A common sight among the folds and fissures of the dry loess plain of northern Shanxi (and neighbouring Shaanxi) are cave dwellings, a traditional form of housing that’s been in use for nearly two thousand years. Hollowed into the sides of hills terraced for agriculture, they house more than eighty million people, and are eminently practical – cheap, easy to make, naturally insulated and long-lasting. In fact, a number of intact caves in Hejin, on the banks of the Yellow River in the west of the province, are said to date back to the Tang dynasty. Furthermore, in a region where flat land has to be laboriously hacked out of the hillside, caves don’t take up land that could be cultivated.

The facade of the cave is usually a wooden frame on a brick base. Most of the upper part consists of a wooden lattice – designs of which are sometimes very intricate – faced with white paper, which lets in plenty of light, but preserves the occupants’ privacy. Tiled eaves above protect the facade from rain damage. Inside, the single-arched chamber is usually split into a bedroom at the back and a living area in front, furnished with a kang, whose flue leads under the bed and then outside to the terraced field that is the roof – sometimes, the first visible indication of a distant village is a set of smoke columns rising from the crops.

Such is the popularity of cave homes that prosperous cave dwellers often prefer to build themselves a new courtyard and another cave rather than move into a house. Indeed, in the suburbs of towns and cities of northern Shaanxi, new concrete apartment buildings are built in imitation of caves, with three windowless sides and an arched central door. It is not uncommon even to see soil spread over the roofs of these apartments with vegetables grown on top.

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