1. Han
The largest ethnic group is Han. While the Han people constitute the majority, there are 55 ethnic minority (formally recognized) groups in China.
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Well here are things you can measure in SI units: volume, mass, length, density
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All men are required to register though it doesn't mean they join
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Both exports and imports are beneficial to economic growth, largely by boosting productivity. Firms in Canada that export have significantly higher productivity than firms that do not export. Imports of intermediate inputs contributed over half of Canada's recent productivity growth.
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