The Tumen (Duman) River is a river in northeast Asia, on the border between China and North Korea in its upper reaches, and between North Korea and Russia in its lower stretches. The name of the river comes from the Jurchen tumen, which means "ten thousand." Traditional Chinese characters are one of two standard character sets of printed contemporary Chinese written language. ... Simplified Chinese characters (Simplified Chinese: 简体字; Traditional Chinese: 簡體字; pinyin: jiǎntǐzì; also called 简化字/簡化字, jiǎnhuàzì) are one of two standard character sets of printed contemporary Chinese written language. ... Pinyin (拼音, Pīnyīn) literally means join (together) sounds (a less literal translation being phoneticize, spell or transcription) in Chinese and usually refers to Hànyǔ Pīnyīn (汉语拼音, literal meaning: Han language pinyin), which is a system of romanization (phonetic notation and transliteration to roman script) for Standard Mandarin used in the... Wade-Giles, sometimes abbreviated Wade, is a Romanization (phonetic notation and transliteration) system for the Chinese language based on Mandarin. ... McCune-Reischauer is one of the two most widely used Korean language romanization systems, along with the Revised Romanization of Korean, which replaced McCune-Reischauer as the official romanization system in South Korea in 2000. ... The Revised Romanization of Korean is the official Korean language romanization system in South Korea. ... Hangul is the native alphabet used to write the Korean language, as opposed to the Hanja system borrowed from China. ... Hanja (lit. ... World map showing location of Asia A satellite composite image of Asia Asia is the central and eastern part of the continent of Eurasia, defined by subtracting the European peninsula from Eurasia. ... The Jurchens (Chinese: 女真, pinyin: nǚzhēn) were a Tungusic people who inhabited parts of Manchuria and northern Korea until the seventeenth century, when they became the Manchus. ...

The river is 521 km long, rising in the Changbai (Jangbaek) Mountains and flowing into the Sea of Japan. The Changbai (Changbaek) Mountains are a mountain range on the border between China and North Korea. ... The Sea of Japan, known as the East Sea in South Korea, the East Sea of Korea in North Korea, and the Japan Sea in China, is a marginal sea of the western Pacific Ocean, bound by the Japanese islands of Hokkaido, Honshu and Kyushu and Sakhalin island to the...

See also

• Geography of China
• Geography of North Korea
• List of Korea-related topics