China has one of the world's oldest people and continuous civilizations, consisting of states and cultures dating back more than six millennia. It has the world's longest continuously used written language system, and is the source of such major inventions as what the British scholar and biochemist Joseph Needham called the "four great inventions of Ancient China": paper, the compass, gunpowder, and printing. Historically China's cultural sphere has been very influential in East Asia as a whole, with Chinese religion, customs, and writing system being adopted, to varying degrees, by its neighbors Japan, Korea, and Vietnam.
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