Spectators visit a historic and cultural exhibiton of Qi(1046BC-221BC), an ancient Chinese state during the Zhou Dynasty of ancient China, in Xi’an, capital of northwest China’s Shaanxi province, July 16, 2015. The exhibition, displaying a total of 194 cultural relics, opened in Xi’an on July 16 and will last until Oct 16 this year.[Photo/Xinhua]

Spectators visit a historic and cultural exhibiton of Qi(1046BC-221BC), an ancient Chinese state during the Zhou Dynasty of ancient China, in Xi’an, capital of northwest China’s Shaanxi province, July 16, 2015. The exhibition, displaying a total of 194 cultural relics, opened in Xi’an on July 16 and will last until Oct 16 this year.[Photo/Xinhua]

Photo taken on July 16, 2015 shows a cultural relic during a historic and cultural exhibiton of Qi(1046BC-221BC), an ancient Chinese state during the Zhou Dynasty of ancient China, in Xi’an, capital of northwest China’s Shaanxi province. The exhibition, displaying a total of 194 cultural relics, opened in Xi’an on July 16 and will last until Oct 16 this year.[Photo/Xinhua]

Spectators visit a historic and cultural exhibiton of Qi(1046BC-221BC), an ancient Chinese state during the Zhou Dynasty of ancient China, in Xi’an, capital of northwest China’s Shaanxi province, July 16, 2015. The exhibition, displaying a total of 194 cultural relics, opened in Xi’an on July 16 and will last until Oct 16 this year.[Photo/Xinhua]

Spectators visit a historic and cultural exhibiton of Qi(1046BC-221BC), an ancient Chinese state during the Zhou Dynasty of ancient China, in Xi’an, capital of northwest China’s Shaanxi province, July 16, 2015. The exhibition, displaying a total of 194 cultural relics, opened in Xi’an on July 16 and will last until Oct 16 this year.[Photo/Xinhua]