Visitors look at the fossils of chilotherium at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

A visitor looks at ore specimens at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

A visitor looks at ore specimens at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

Photo taken on May 27, 2014 shows a specimen of native copper at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

Visitors look at the fossils of chilotherium at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

Visitors look at fossils at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

Visitors look at ore specimens at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)

Visitors look at ore specimens at Shanxi Geological Museum in Taiyuan, capital of north China's Shanxi Province, May 27, 2014. Shanxi Geological Museum opened to public on May 18, after 8 years of planning and construction. (Xinhua/Zhan Yan)