Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Chao Yuen Ren (3 November 1892 – 25 February 1982) was a Chinese American linguist and amateur composer. He made important contributions to the modern study of Chinese phonology and grammar. Besides helping to shape the Gwoyeu Romatzyh, a Chinese romanization scheme, Chao is also credited with inventing a notation for transcribing tonal pitch variation in spoken languages.

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