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Originally conceived by Emperor Qin Shi Huang (c. 259-210 B.C.) in the third century B.C. to defend against enemies like the Mongols.
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1211 AD: Genghis Khan invaded and conquered China.
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1368 AD: The Chinese expel the Mongols and establish the Ming Dynasty
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1368-1644 AD: China builds a newer stronger wall made of granite, brick and limestone.
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Surface mining of coal started around 1900 in China and in 1949 the total production of coal was only 32.43Mt.
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Open pit mining method was used in China from 1949 to 1980.
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Rice area harvested has declined from its peak of 37 million in the mid-1970s to 31 million in 1995 to 30 million in 2010.
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China has increased substantially in recent years, with its share of national production doubling from 7.5% in 1995 to 15% in 2009.
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The Three Gorges Dam is the world’s largest hydroelectric dam. It became official in June 30, 2009.
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The 2010 population on the mainland was nearly 1.4 billion and 53% lived in rural areas.
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Since 2010, China ranks as the world’s second-largest economy after the United States.
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China is the biggest coal producing country in the world with an annual production rate of 324 Mt in 2010.
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By the end of the year 2010, the annual coal production rate reached 3.24 billion tons.
