Visitors view a piece of restored Tang Dynasty fresco at Shaanxi History Museum in Xi'an, capital of Northwest China's Shaanxi province on June 21, 2016. (Photo/shaanxici.cn)
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Visitors view a piece of restored Tang Dynasty fresco at Shaanxi History Museum in Xi'an, capital of Northwest China's Shaanxi province on June 21, 2016. (Photo/shaanxici.cn)