Dayuan Oasis Food Safety Technology Co., Ltd.   Zibo Dayuan International Trade Co., Ltd   Heze dayuan chemical Import and export Co.,LTd   DaYu Chemicals Co.Ltd   DaYuan International Co., Limited   DaYuan International Co., Limited   Shandong Duanxintang Dayu Pharmaceutical Co., Ltd.   Dezhou Dayu Water Purifying Agents Co., Ltd.   Shandong Duanxintang Dayu Pharmaceutical Co.,Ltd   CHANGZHOU DAYUAN CHEMICAL INDUSTRY CO., LTD.   Tianjin Dayun Chemicals Import &Export Co.,ltd    Tianjin Dayun Chemicals Import &Export Co.,ltd   shandong duanxintang dayu pharmaceutical co.,ltd    Tianjin Odayuan Chemicals Co.,Ltd    Tianjin Odayuan Chemicals co.,Ltd   Shanghai DaYu Biochemistry Co.,Ltd   Shandong Dayu Longshen Biochem Technological Co., Ltd   shanghai dayu express co., ltd   Shijiazhuang Dayuan Chemical Industry Co.,Ltd.   Ningbo Dayu Food Co., Ltd