Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
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In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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China's capital Beijing means "Gate".
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The retail price for the iPad would be $1,140 if it were built by American workers instead of Chinese.
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