In China, teachers allow children to sleep in class for around 20 minutes to help improve their learning.
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In the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
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The gas that gives rotten eggs their distinctive foul smell may slow ageing and block damaging chemical reactions inside cells, according to scientists in China.
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In 2012, a Chinese gamer's father was so concerned about his son's habit, he hired virtual hitmen to kill off his avatar.
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