One of the mysteries of the English language finally explained.
That part of China under communist control; China as a communist state; (later) the People's Republic of China.
1920s; earliest use found in Davenport (Iowa) Democrat. From red + the name of China. Compare Chinese hóngsè zhōnghuá, the title of a periodical (and news service) which served as the organ of the Chinese Soviet Provisional Central Government and was instituted at Mao Zedong's initiative.
Red China/ˌrɛd ˈtʃʌɪnə/
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