沽源 Traditional form: 沽源 Pinyin (reading): Gūyuán Definitions: Guyuan county in Zhangjiakou 張家口/张家口 ( Zhāngjiākǒu), Hebei Characters: 沽 - to buy and sell; of inferior quality 源 - spring; source, root, head; surname Traditional characters: 沽 - to buy and sell; of inferior quality 源 - spring; source, root, head; surname