An earth yellow-colored cover is installed to protect the ancient city wall of Shang Dynasty (16th century B.C. - 11th century B.C.) in Zhengzhou city, capital of Central China’s Henan province, May 30, 2015. (Photo/CFP)
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An earth yellow-colored cover is installed to protect the ancient city wall of Shang Dynasty (16th century B.C. - 11th century B.C.) in Zhengzhou city, capital of Central China’s Henan province, May 30, 2015. (Photo/CFP)