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 the U.S. the typical school year is 180 days long. In China, the typical school year is 251 days.
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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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For Valentine's Day 2014, an unnamed man sabotaged a special screening of "Beijing Love Story" at a Shanghai cinema by booking every other seat, subsequently preventing couples from sitting together.
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