Sinosphere

Imperial China was a major regional power in Eastern Asia and exerted influence on tributary states and neighboring states, including Japan, Korea, and Vietnam.}} These interactions brought ideological and cultural influences rooted in Confucianism, Buddhism, and Taoism. The four cultures were ruled by their respective emperors under similar imperial systems. Chinese inventions influenced, and were in turn influenced by, innovations of the other cultures in governance, philosophy, science, and the arts. Literary Chinese became the written lingua franca for bureaucracy and communications, and Chinese characters became locally adapted as kanji in Japan, hanja in Korea, and in Vietnam.
In late classical history, the literary importance of classical Chinese diminished as Japan, Korea, and Vietnam each adopted their own writing systems. Japan developed the katakana and hiragana scripts, Korea created hangul, and Vietnam developed (now rarely used in lieu of the modern Latin-based Vietnamese alphabet). Classical literature written in Chinese characters nonetheless remains an important legacy of Japanese, Korean, and Vietnamese cultures. In the 21st century, ideological and cultural influences of Taoism, Confucianism and Buddhism remain visible in high culture and social doctrines. Provided by Wikipedia
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