Hebei Kangzhuang Environmental Protection Technology Co., Ltd.   Hunan YuanCao Biological Technology Co., Ltd.   Hunan Great Steel Pipe Co.Ltd   Qingdao Taijiakangmei Trading Co,Ltd   Qingdao Taijiakangmei Trading Co,Ltd   DongGuan LingKang Wire & Cable Co.,LTD   Wuhan KangMei Biotechnology Co., Ltd.   KANGNAM CHEMICAL   Hunan Hui Bai Shi Biological Technology Co.,Ltd   WUHAN DONG KANG YUAN TECHNOLOGY CO., LTD.   YongKang Co Ltd.   hunan normal university   Hunan Great Steel Pipe Co., Ltd   Hunan YC Biological Technology Co., Ltd.   Hunan Great Steel Pipe Co., Ltd   Hunan Magpow Adhesive Group   Zhuhai Jiaxinkang Pharmaceutical & Chemical Co., L   Hunan Kori Convertors Co. Ltd.   Dongkang source technology co., LTD   Hunan Standard Steel Co.,Ltd