洱源 Traditional form: 洱源 Pinyin (reading): Eryuán Definitions: Eryuan county in Dali Bai autonomous prefecture 大理白族自治州 ( Dàlǐ Báizúzìzhìzhōu), Yunnan Characters: 洱 - a lake in Yunnan province 源 - spring; source, root, head; surname Traditional characters: 洱 - a lake in Yunnan province 源 - spring; source, root, head; surname