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An exhibition of tri-colored glazed pottery works of the Tang Dynasty (618-907) is held at the Shaanxi History Museum in Xi'an city, capital of Northwest China's Shaanxi province, March 22, 2016. About 130 tri-colored glazed pottery works selected from the dynasty's two capitals, Chang'an (present-day Xi'an) and Luoyang in Henan province, were displayed in the exhibition. [Photo/China News Service]