Tengzhou Zhongzheng Chemical Co.,Ltd   Tengzhou Tianshui Bio-Technology Co.,Ltd   Tianjin Xintaiweiyuan Chemical Co.,Ltd   Tianjin xintaiweiyuan chemical Co.,ltd.   Shandong Tengzhou Tianxiang Essence Spice Limited Company   Tengzhou dongxin chemical plant   Xintaiweiyuan Chemical Co.ltd   Tengzhou Jitian Aroma Chemicla Co.,Ltd.   Tengzhou Zhongtai Fine Chemicals Co., Ltd   Tengzhou Aolong Chemical Co., Ltd   Tengzhou Readfine Chemical Co.,Ltd.   Tengzhou Tenglong Chemical Co.,Ltd.   Tengzhou Tengbao Chemical Co.,Ltd   Tengzhou Jitian Aroma Chemical Co.,Ltd.   tengzhoushi tianhao shengwu kejifazhan co.,ltd   Hebei Weiyuan Heilen Bio-Chemical Co.,Ltd.   Hangzhou Weiyuan Chemical Co., Ltd.   Hangzhou Weiyuan Chemical Co.,Ltd.   Shanghai Weiyuan Fine Fluorine Science & Development Co., Ltd.   Zhejiang Xianju Tengzhou Chemical Factory