Is China a part of South Asia?
East Asia
China, Japan, and Korea represent the three core countries and civilizations of traditional East Asia - as they once shared a common written language, culture, as well as sharing Confucian philosophical tenets and the Confucian societal value system once instituted by Imperial China. Other usages define China, Hong Kong, Macau, Japan, South Korea, North Korea and Taiwan as countries that constitute East Asia based on their geographic proximity as well as historical and modern cultural and economic ties, particularly with Japan and Korea having strong cultural influences that originated from China. Some scholars include Vietnam as part of East Asia as it has been considered part of the greater sphere of Chinese influence. Though Confucianism continues to play an important role in Vietnamese culture, Chinese characters are no longer used in its written language and many scholarly organizations classify Vietnam as a Southeast Asian country. Mongolia is geographically north of China yet Confucianism and the Chinese writing system and culture had no impact in Mongolian society. Thus, Mongolia is sometimes grouped with Central Asian countries such as Turkmenistan, Kyrgyzstan, and Kazakhstan.
Tibet
All of modern China, including Tibet, is considered a part of East Asia. Historically, some European sources also considered parts of Tibet to lie in Central Asia. Tibet is west of the Central China plain, and within mainland China, Tibet is regarded as part of (), a term usually translated by Chinese media as "the Western section", meaning "Western China".