Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows a colored horsewoman figure of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows colored horsewoman figures of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)

Photo taken on Dec. 6, 2019 shows colored horsewoman figures of Tang Dynasty (618-907) displayed at Xi'an Museum in Xi'an, capital city of northwest China's Shaanxi Province. (Xinhua/Liu Xiao)