An undated file photo shows terra-cotta horses and warriors unearthed from the tomb of Emperor Qin Shihuang (259-210 B.C.), about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The Qin Shihuang Terra-cotta Warriors and Chariots Museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.

An undated file photo shows terra-cotta warriors unearthed from the tomb of Emperor Qin Shihuang (259-210 B.C.), about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The Qin Shihuang Terra-cotta Warriors and Chariots Museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.

An undated file photo shows an interior view of the Qin Shihuang (259-210 B.C.) Terra-cotta Warriors and Chariots Museum at the site of the tomb of Emperor Qin Shihuang, about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.

An undated file photo shows terra-cotta warriors unearthed from the No. 2 pit of the tomb of Emperor Qin Shihuang (259-210 B.C.), about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The Qin Shihuang Terra-cotta Warriors and Chariots Museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.

An undated file photo shows the head of a terra-cotta warriors unearthed from the No. 2 pit of the tomb of Emperor Qin Shihuang (259-210 B.C.), about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The Qin Shihuang Terra-cotta Warriors and Chariots Museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.

An undated file photo shows terra-cotta warriors and horses unearthed from the No. 2 pit of the tomb of Emperor Qin Shihuang (259-210 B.C.), about 35 km from Xi'an, capital of northwest China's Shaanxi Province. Famous as the "world's eighth wonder," the terra-cotta worriers were found east to Emperor Qin Shihuang's tomb. The Qin Shihuang Terra-cotta Warriors and Chariots Museum established at the site in 1979 houses 8,000 life-size terra-cotta warriors and horses made in Qin Dynasty (221-207 BC). They were put on the World Cultural Heritage list in 1987.