红河 Traditional form: 紅河 Pinyin (reading): Hóng Hé Definitions: Red River, principal river of northern Vietnam, originating in Yunnan (southwestern China) Characters: 红 - red, vermillion; to blush, to flush; popular 河 - river, stream; the Yellow river Traditional characters: 紅 - red, vermillion; to blush, to flush; popular 河 - river, stream; the Yellow river