Photo taken on Aug. 5, 2015 shows engraved wooden doors of Bai ethnic group in Dali, southwest China's Yunnan Province. The Bai architecture is characterized by three buildings forming a U and a fourth wall as a screen. The middle has a courtyard. The houses are usually built out of brick and wood, and the screen wall is built with brick and stone. (Xinhua/Yang Zongyou)
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